The following table of cycle period lengths is taken from the Cycles - Classic Library Collection published by the Foundation for the Study of Cycles. The numbers after the cycle series name and description of the cycle are page references. The period lengths are sometimes stated as a whole number of years, which may mean that the cycle period is not known accurately or that the period was close to a whole number of years.
In some cases periods such as 3.33 years are given which may mean about 3 and 1/3 years which is presumably more accurate than a whole number of years. There seems to be a tendency to use 1/2, 1/3 and 1/6 of years, perhaps because these are whole numbers of months. In that case the accuracy may be about 1 month. In other cases (most notably Dewey’s analysis) the periods are stated with more decimal places and probably does truly reflect the accuracy of the results, e.g. 5.92 or 5.537 years.
| Cycle Lengths in Hours | |
| Duration | Description; Page Numbers |
| 1 hour and 4 minutes cycle | eruption of Old Faithful geyser; 127 |
| 12.5-hour cycle | tides; 80 |
| 12.75-hour cycle | tides; 65 |
| 24-hour cycle | the day; 80; 264 |
| diurnal cycle | earthquakes; 127 |
| 24-hour cycle | light and dark on earth; 65 |
| Cycle Lengths in Days | |
| 7-day cycle | aftershock; 284 |
| 8-day cycle | aftershock; 284 |
| 10-day cycle | aftershock; 284 |
| 12-day cycle | aftershock; 284 |
| 13.25-16.25-day cycle | stock prices; 740 |
| 14-day cycle | aftershock; 284 |
| 14.75-day (2.1-week) cycle | stock prices; 741-742 |
| 14.8-day (2.-11-week) cycle | earthquakes; 127 |
| 14-28-day (2-4 week) cycle | amorousness of women; 281; 283 |
| 29.5-day (4.21-week) cycle | births of infants; 278; 281-283 |
| 29.6-day (4.23-week) cycle | earthquakes; 127 |
| 34 market-day cycle | sugar prices; 21-22 |
| 120.166-day (17.14-week) cycle | stock prices; 467-496 |
| 387-day (55.29-week) cycle | brightness of T Cephei; 122-123 |
| 433-day (61.86-week) cycle | variations of latitude; 732 |
| Cycle Lengths in Weeks | |
| 2-week cycle | insect swarms; 10 |
| 2-week cycle | stock market; 10 |
| 17-week (3.88-month) cycle | stock prices; 270; 402 |
| 17-week (3.88-month) cycle | the sun; 402 |
| 17-week (3.88-month) cycle | sunspots; 119; 232; 270 |
| 17.166-week (3.915-month) cycle | stock prices; (Dow Jones Industrial Averages); 467-496 |
| 17.166-week (3.915-month) cycle | sunspots; 232-233; 492 |
| Cycle Lengths in Months | |
| 3-month (13.04-week) cycle | textile plant sales; 40-44 |
| 3.937-month (17.1-week) cycle | stock prices (industrial); 63 |
| 4-month (17.39-week) cycle | electric potential of trees; 63 |
| 4-month (17.39-week) cycle | stock prices; 467 |
| 4.05-month (17.63-week) cycle | sales of Company G; 63 |
| 5.9-month (25.65-week) cycle | stock prices (industrial); 63 |
| 6-month (26.09-week) cycle | earthquakes; 127 |
| 6-month (26.09-week) cycle | electric potential of trees; 63; 280; 309-311 |
| 6.33-month (27.52-week) cycle | stock prices; 403 |
| 6.33-month (27.52-week) cycle | stock prices (industrial); 521 |
| 6.37-month (27.69-week) cycle | stock prices; 521 |
| 6.41-month (27.87-week) cycle | stock prices; 403 |
| 6.41-month (27.87-week) cycle | stock prices (industrial); 520 |
| 7.92-month (34.44-week) cycle | sales of Company G; 63 |
| 8.8-month (38.26-week) cycle | sales of Company G; 63 |
| 9-month (39.13-week) cycle | bank debits; 63 |
| 9.18-month (39.91-week) cycle | ton miles (Canadian Pacific Railway); 41-43; 359-361; 372-377 |
| 9.2-month (40-week) cycle | stock prices (industrial); 360 |
| 9.7-month (42.18-week) cycle | breeding of sooty terns; 278; 286-287 |
| 11.9-month (51.74-week) cycle | stock prices (industrial); 63 |
| 12-month (52.18-week) cycle | earth around sun; 65 |
| 12-month (52.18-week) cycle | earthquakes; 127 |
| 12-month (52.18-week) cycle | spring flowers cause; 80 |
| 12-month (52.18-week) cycle | temperature of air; 65; 732; 740 |
| 12-month (52.18-week) cycle | ton miles (Canadian Pacific Railway); 359 |
| 12.01-month (1.01-year) cycle | pig iron; 20 |
| 12.01-month (1.01-year) cycle | plagues; 20 |
| 12.36-month (1.03-year) cycle | temperature; 734 |
| 13.3-month (1.11-year) cycle | stock prices (industrial); 63 |
| 15.3-month (1.28-year) cycle | stock prices; 465 |
| 17.8-month (1.48-year) cycle | stock prices; 63 |
| 21-month (1.75-year) cycle | pipe fittings; 47-49; 388-394 |
| 23-month (1.92-year) cycle | stock prices; 465 |
| 23-month (1.92-year) cycle | textile production; 19-20 |
| 23.6-month (1.94-year) cycle | automobile factory sales; 63 |
| 23.7-month (1.98-year) cycle | stock prices (industrial); 63 |
| 24-month cycle | cotton production; 325 |
| 24-month cycle | evening grosbeak; 279 |
| 24-month cycle | rayon production; 380 |
| 24-month cycle | sweet potato production; 382 |
| 24.2-month (2.02-year) cycle | economic activity; 290 |
| 30-month (2.5-year) cycle | pipe fittings; 47-49; 388-394 |
| 30.29-month (2.524-year) cycle | lake levels; 137; 139 |
| 30.66-month (2.555-year) cycle | lake levels; 137; 139 |
| 31.04-31.13-month (2.587-2.594-year) cycle | lake levels; 137; 139 |
| 32.41-month (2.701-year) cycle | lake levels; 137; 139 |
| 32.82-month (2.735-year) cycle | wheat price index; 731; 734 |
| 33-month (2.75-year) cycle | automobile factory sales; 360 |
| 33-month (2.75-year) cycle | bond prices; 19 |
| 33-month (2.75-year) cycle | building activity and construction (residential); 19; 313; 342; 360 |
| 33-month (2.75-year) cycle | climate; 360-361 |
| 33-month (2.75-year) cycle | consumer goods; 19 |
| 33-month (2.75-year) cycle | copper prices; 360 |
| 33-month (2.75-year) cycle | General Motors sales; 360 |
| 33-month (2.75-year) cycle | pig iron prices; 360 |
| 33-month (2.75-year) cycle | prices; 19; 360 |
| 33-month (2.75-year) cycle | rayon production; 360; 380 |
| 33-month (2.75-year) cycle | retail sales; 19 |
| 33-month (2.75-year) cycle | sales of an industrial company; 360 |
| 33-month (2.75-year) cycle | ton miles (Canadian Pacific Railway); 359-361; 378-379 |
| 33-month (2.75-year) cycle | wheat prices; 360 |
| 33.46-33.65-month cycle |
lake levels; 137; 139 |
| 34.86-month (2.905-year) cycle | lake levels; 137; 139 |
| 35.6-month (2.97-year) cycle | stock prices; 63 |
| Cycle Lengths in Years | |
| 3-year cycle | automobile factory sales; 63 |
| 3-year cycle | General Electric sales; 317 |
| 3-year cycle | influenza; 20 |
| 3-year cycle | pneumonia; 20 |
| 3-year cycle | varves; 125 |
| 3-3.5-year cycle | business activity; 740 |
| 3.006-year (36.072-month) cycle | lake levels; 137; 139 |
| 3.02-year (36.2-month) cycle | stock prices; 63 |
| 3.13-year (37.56-month) cycle | lake levels; 137; 139 |
| 3.25-year (39-month) cycle | commercial paper rates; 500 |
| 3.25-year (39-month) cycle | lake levels; 137; 139 |
| 3.28-3.29-year (39.36-39.48-month) | lake levels; 137; 139 |
| 3.33-year (40-month) cycle | commercial paper rates; 500 |
| 3.33-year (40-month) cycle | economic time series (clearings; commodity prices; interest rates); 500 |
| 3.33- or 3.42-year (40- or 41-month) | economy; 16 |
| 3.34-year (40.08-month) cycle | Like level;; 137; 139 |
| 3.39-year (40.7-month) cycle | stock prices (industrial); 497 |
| 3.4 year (40.8-month) cycle | pig iron production; 13-16 |
| 3.4 year (40.8-month) cycle | variation in solar radiation; 16 |
| 3.4 year (40.8-month) cycle | Westinghouse Electric and Manufacturing Co. sales and production; 17 |
| 3.42-year (41 month) cycle | bank debits; 505 |
| 3.42-year (41 month) cycle | commercial paper rates; 500 |
| 3.42-year (41 month) cycle | commodities; 16 |
| 3.42-year (41 month) cycle | failures; 588-597 |
| 3.42-year (41 month) cycle | pig iron production; 13; 44; 48; 64 |
| 3.42-year (41 month) cycle | pipe fittings; 47-49; 388; 394 |
| 3.42-year (41 month) cycle | prices; 500 |
| 3.42-year (41 month) cycle | production 16; 500 |
| 3.42-year (41 month) cycle | sales; 16 |
| 3.42-year (41 month) cycle | steel production; 16 |
| 3.42-year (41 month) cycle | stock prices; 16 |
| 3.42-year (41 month) cycle | stock prices (industrial); 402-403; 497-506 |
| 3.46-3.48 year (41.5-41.8-month) | lake levels; 137; 139 |
| 3.5-year (42-month) cycle | business; 314; 395-400 |
| 3.5-year (42-month) cycle | pig iron production 347 |
| 3.5-year (42-month) cycle | rayon production; 380 |
| 3.54-year (42.48-month) cycle | war; 638; 640 |
| 3.60-3.62-year (43.20-43.44-month) | lake levels; 137; 139 |
| 3.67-year (44-month) cycle | pipe fittings; 47-49; 388-394 |
| 3.69-year (44.3-month) cycle | pine grosbeak; 751 |
| 3.767-year (45.20-month) cycle | weather; 761-762; 764 |
| 3.8154-year (45.78-month) cycle | stock prices; 456 |
| 3.83-year (46-month) cycle | stock prices; 402; 471; 456-466 |
| 3.91-3.92-year (46.92-47.04-month) | lake levels; 137; 139 |
| 4-year cycle | cheese consumption; 272; 313; 344 34l |
| 4-year cycle | mice plagues; 10-11 |
| 4-year cycle | pine grosbeak; 751 |
| 4-year cycle | sunspots; alternate cycles reversed; 272 |
| 4.14-year (49.7-month) cycle | lake levels; 137; 139 |
| 4.2-year (50.4-month) cycle | love rings; 58 |
| 4.2-year (50.4-month) cycle | weather; 58 |
| 4.222-year (50.664-month) cycle | deaths in Massachusetts; 757 |
| 4.222-year (50.664-month) cycle | temperature; 750-764 |
| 4.222-year (50.664-month) cycle | tree rings (Arizona); 752; 757 |
| 4.222-year (50.664-month) cycle | varves; 752 |
| 4.225-year (50.7-month) cycle | pine grosbeak; 751 |
| 4.25-year (51-month) cycle | dates of thawing and freezing of rives; 751 |
| 4.25-year (51-month) cycle | river break-up; 752 |
| 4.33-year (52-month) cycle | lake levels; 137; 139 |
| 4.37-year (52.44 month) cycle | sales of Company G; 63 |
| 4.4-year (52.8 month) cycle | stock prices (industrial); 63 |
| 4.4-year (52.8 month) cycle | stock prices (railroad); 63 |
| 4.41 year (52.92-month) cycle | advertising effectiveness; 63 |
| 4.41 year (52.92-month) cycle | temperature; 63 |
| 4.41 year (52.92-month) cycle | wheat prices; 63 |
| 4.418-year (53.016-month) cycle | wear; 761-762 |
| 4.44-year (53.28-month) cycle | pig iron price;; 63 |
| 4.50-year (54-month) cycle | lake levels; 137; 139 |
| 4.77-year (57.24-month) cycle | lake levels; 137-138 |
| 4.8-year (57.6-month) cycle | sunspots; 270 |
| 5.0-year cycle | post office revenues; 598; 600 |
| 5.0-year cycle | stock price; 411 |
| 5.107-year (61.284 month) cycle | international bellies; 692 |
| 5.2-year (62.4-month) cycle | ton miles (Canadian Pacific Railway) 359; 364-367 |
| 5.20-5.28-year (62.40-63.36-month) | lake levels; 137-138 |
| 5.289-year (63.468-month) cycle | post office revenues; 598; 600 |
| 5.377-year (63.524-month) cycle | international battles; 692 |
| 5.445-year (65.340.month) cycle | international battles; 692 |
| 5.47-year (6i64-month) cycle | com prices; 569 |
| 5.4-5.6-year (64.8-67.2-month) | cotton prices; 315 |
| 5.4-5.6-year (64.8-67.2-month) | pig iron prices; 315 |
| 5.4-5.6-year (64.8-67.2-month) | sales of manufacturing companies; 315 |
| 5.4-5.6-year (64.8-67.2-month) | sunspots; 315 |
| 5.4-5.6-year (64.8-67.2-month) | weather; 315 |
| 5.5-year (66-month) cycle | advertising effectiveness; 74 |
| 5.5-year (66-month) cycle | airplane traffic; 74; 312; 315 |
| 5.5-year (66-month) cycle | bank debits; 74 |
| 5.5-year (66-month) cycle | business activity; general; 74 |
| 5.5-year (66-month) cycle | business recessions; 74 |
| 5.5-year (66-month) cycle | cement stocks; 74 |
| 5.5-year (66-month) cycle | coal (bituminous) prices; 74 |
| 5.5-year (66-month) cycle | cocoa bean prices; 74 |
| 5.5-year (66-month) cycle | commercial crises; 74 |
| 5.5-year (66-month) cycle | com prices; 74; 315; 382; 527; 528; 565-574; 741 |
| 5.5-year (66-month) cycle | coin production; 74 |
| 5.5-year (66-month) cycle | cotton prices; 74 |
| 5.5-year (66-month) cycle | Dow Chemical Co. plant expansions; 74 |
| 5.5-year (66-month) cycle | economic affairs; 73 |
| 5.5-year (66-month) cycle | hog prices; 74 |
| 5.5-year (66-month) cycle | international battles; 693 |
| 5.5-year (66-month) cycle | manufacturing production; 74 |
| 5.5-year (66-month) cycle | prices; 74; 315; 382; 527-528; 565; 574; 741 |
| 5.5-year (66-month) cycle | purchasing power of hogs; 74 |
| 5.5-year (66-month) cycle | pig iron prices; 74 |
| 5.5-year (66-month) cycle | stock prices; 315 |
| 5.5-year (66-month) cycle | stock prices (industrial); 74 |
| 5.5-year (66-month) cycle | stock prices (railroad); 74 |
| 5.5-year (66-month) cycle | the sun; 74 |
| 5.5-year (66-month) cycle | wheat prices; 74 |
| 5.5-year (66-month) cycle | wildlife abundance; 74 |
| 5.537-year (66.444-month) cycle | post office revenues; 598; 600 |
| 5.57-year (66.84-month) cycle | cotton prices; 569 |
| 5.575-year (66.9 month) cycle | cotton prices; 558 |
| 5.6 year (67.2-month) cycle | sunspots; 270 |
| 5.6 year (67.2-month) cycle | sweet potato production; 314; 382-384 |
| 5.6 year (67.2-month) cycle | wheat prices; 314; 358 |
| 5.6 year (67.2-month) cycle | wheat production; 314; 358 |
| 5.602-year (67.224-month) cycle | international battles; 692 |
| 5.61-yea; (67.3-month) cycle | coin prices; 571 |
| 5.62-year (67.5-month) cycle | corn prices; 741 |
| 5.625-year (67.5 month) cycle | sunspots; 231; 270 |
| 5.692-year (68.304-month) cycle | international battles; 692 |
| 5.737-year (68.844-month) cycle | international war; 692 |
| 5.790-year (69.48-month) cycle | post office revenues; 598; 600 |
| 5.887-year (70.644-month) cycle | sunspots alternate cycles reversed; 75 |
| 5.89-year (70.68-month) cycle | sunspots; 7475; 119; 227-231 |
| 5.9-year; (70.8-month) cycle | business activity; general; 74 |
| 5.9-year; (70.8-month) cycle | business failure;; 63; 74-75; 588; 590-597 |
| 5.9-year; (70.8-month) cycle | coal stock price; 74 |
| 5.9-year; (70.8-month) cycle | copper prices; 74 |
| 5.9-year; (70.8-month) cycle | copper share prices; 74 |
| 5.9-year; (70.8-month) cycle | cotton prices; 73-74 |
| 5.9-year; (70.8-month) cycle | gasoline; 73 |
| 5.9-year; (70.8-month) cycle | grouse; 73; 75 |
| 5.9-year; (70.8-month) cycle | interest rates; long term; 74 |
| 5.9-year; (70.8-month) cycle | knit underwear; 75 |
| 5.9-year; (70.8-month) cycle | pig iron prices; 74; 590 |
| 5.9-year; (70.8-month) cycle | prices; 73-74 |
| 5.9-year; (70.8-month) cycle | stock prices (combined); 74 |
| 5.9-year; (70.8-month) cycle | stock price (industrial); 74 |
| 5.9-year; (70.8-month) cycle | stock prices (railroad); 63; 74; 590 |
| 5.9-year; (70.8-month) cycle | sunspots; alternate cycles reversed; 73 |
| 5.9-year; (70.8-month) cycle | war; 640 |
| 5.9-year; (70.8-month) cycle | wheat prices; 73 |
| 5.91-year (70.9 month) cycle | business failure liabilities; 227 |
| 5.91-year (70.9 month) cycle | coal stock prices; 75 |
| 5.91-year (70.9 month) cycle | copper prices; 63; 75; 227 |
| 5.91-year (70.9 month) cycle | copper share prices; 75 |
| 5.91-year (70.9 month) cycle | cotton prices; 63; 75; 227; 528; 558-564; 591 |
| 5.91-year (70.9 month) cycle | economic affairs; 73 |
| 5.91-year (70.9 month) cycle | pig iron prices; 63; 75; 227 |
| 5.91-year (70.9 month) cycle | stock prices (combined); 75; 227; 513 |
| 5.91-year (70.9 month) cycle | stock prices (industrial); 227 |
| 5.91-year (70.9 month) cycle | stock prices (railroad); 227 |
| 5.91-year (70.9 month) cycle | sunspots; 590 |
| 5.91-year (70.9 month) cycle | sunspots; alternate cycles reversed; 63; 558 |
| 5.91-year (70.9 month) cycle | tree ring widths; 63; 558 |
| 5.91 or 5.92-year (70.9 or 71-month) | economic series; 74 |
| 5.91 or 5.92-year (70.9 or 71-month) | stock prices; 403; 513-5t8 |
| 5.92-year (71-month) cycle | business activity; 75 |
| 5.92-year (71-month) cycle | interest rates; long term; 76 |
| 5.92-year (71-month) cycle | knit underwear; 75 |
| 5.92-year (71-month) cycle | stock prices (railroad); 75; 513; 516-518 |
| 5.93-year (71.16-month) cycle | stock prices (industrial); 63 |
| 5.93-year (71.16-month) cycle | wheat prices; 76 |
| 5.96-year (71.52-month) cycle | wheat prices; 63 |
| 5.98-6.01-year (71.76-72.12-month) | lake levels; 137-138 |
| 5.98-6.02-year (71.76-72.24-month) | stock prices; 455 |
| 5.982-year (71.782-month) cycle | international battles; 693 |
| 5.994-year (71.928-month) cycle | international battles; 691-692 |
| 6-year cycle | advertising effectiveness; 76 |
| 6-year cycle | Allis-Chalmers Manufacturing Co. sales; 76 |
| 6-year cycle | American Viscose Corp. shipments; 76 |
| 6-year cycle | Armco Steel Corp. sales; 68; 76 |
| 6-year cycle | Armour & Co. sales; 76 |
| 6-year cycle | Bethlehem Steel Corp. production; 76 |
| 6-year cycle | business activity; 76 |
| 6-year cycle | climate; 325 |
| 6-year cycle | Continental Oil Co. income; 76 |
| 6-year cycle | cotton prices; 325 |
| 6-year cycle | cotton production; 76; 313; 322; 326 |
| 6-year cycle | diphtheria; 76 |
| 6-year cycle | I.E. du Pont de Nemours & Co.; sales; 76 |
| 6-year cycle | economic data; 73 |
| 6-year cycle | General Electric orders received; 76; 313; 316-321 |
| 6-year cycle | General Electric sales; 76 |
| 6-year cycle | B.F. Goodrich Co. sales; 76 |
| 6-year cycle | Goodyear Tire & Rubber sales; 76 |
| 6-year cycle | heavy hog prices; 76 |
| 6-year cycle | Inland Steel Co. sales; 76 |
| 6-year cycle | international crises; 76 |
| 6-year cycle | iron production; 76 |
| 6-year cycle | Jones and Laughlin Steel Corp. sales; 76 |
| 6-year cycle | lard prices; 76 |
| 6-year cycle | Monsanto Chemical Co. sales; 76 |
| 6-year cycle | Montgomery Ward and Co. sales; 76 |
| 6-year cycle | National Lead Co. sales; 76 |
| 6-year cycle | Pittsburgh Plate Glass Co. sales; 76 |
| 6-year cycle | prices; 76-77; 325 |
| 6-year cycle | Procter and Gamble Co. sales; 76 |
| 6-year cycle | production; 76; 313; 316; 322-332; 380 |
| 6-year cycle | rainfall; 76 |
| 6-year cycle | rayon production; 76; 380 |
| 6-year cycle | Republic Steel Corp. production; 76 |
| 6-year cycle | rice prices; 76 |
| 6-year cycle | rock strata thickness; 317 |
| 6-year cycle | sales of American industry; 68; 7677; 316 |
| 6-year cycle | Seaboard Air Line operating revenue; 76 |
| 6-year cycle | Sears; Roebuck and Co. sales; 76 |
| 6-year cycle | Standard Oil Co. of California income; 76 |
| 6-year cycle | Stockham Valves and Fittings (Company G); 76 |
| 6-year cycle | steel production; 76; 313; 327-332 |
| 6-year cycle | sugar prices; 77 |
| 6-year cycle | solar activity; 325 |
| 6-year cycle | stock prices; 77; 411 |
| 6-year cycle | stock prices (industrial); 76 |
| 6-year cycle | sunspot numbers; alternate cycles reversed; 77; 317 |
| 6-year cycle | Swift & Co. sales; 77 |
| 6-year cycle | tree rings; 317; 325 |
| 6-year cycle | U.S. Rubber Co. sales; 77 |
| 6-year cycle | U.S. Steel Corp. stock earnings; 77 |
| 6-year cycle | U.S. Steel Corp. stock prices; 77 |
| 6-year cycle | Wilson & Co. sales; 77 |
| 6-year cycle | varve thickness; 77; 125 |
| 6-year cycle | weather; 77 |
| 6-year cycle | wholesale commodity prices; 77 |
| 6-year cycle | Youngstown Sheet & Tube Co. sales; 77 |
| 6.01-year cycle | stock prices; 402; 453-455 |
| 6.03-year cycle | economic data; 73 |
| 6.07-year cycle | stock prices; 513 |
| 6.1-year cycle | cigarette stock prices; 77 |
| 6.1-year cycle | cotton prices; 77; 558 |
| 6.1-year cycle | economic affairs; 73 |
| 6.1-year cycle | flood stages; Nile River; 77 |
| 6.1-year cycle | pig iron prices; 74; 77 |
| 6.1-year cycle | post office revenues; 598; 600 |
| 6.1-year cycle | stock prices (industrial); 74; 77 |
| 6.1-year cycle | stock prices (rail); 74; 77 |
| 6.1-year cycle | sunspot numbers; alternate cycles reversed; 77 |
| 6.1-year cycle | tree rings; 77 |
| 6.1-year cycle | weather; 77 |
| 6.1- or 6.2-year cycle | flood stages; Nile River; 74 |
| 6.1- or 6.2-year cycle | sunspot numbers; 74 |
| 6.2-year cycle | cigarette stock prices; 74 |
| 6.2-year cycle | failures; 591 |
| 6.2-year cycle | interest rates (short term); 74 |
| 6.2-year cycle | post office revenue; 598; 600 |
| 6.2-year cycle | production (industrial); 74 |
| 6.2-year cycle | stock prices; 513 |
| 6.2-year cycle | war; 692 |
| 6.2-year cycle | weather; 74 |
| 6.4-year cycle | aluminum production; 313; 333; 337 |
| 6.4-year cycle | cotton prices; 336 |
| 6.4-year cycle | failures; 336 |
| 6.4-year cycle | General Motors sales of passenger cars and trucks; 336 |
| 6.4-year cycle | kill of grouse; 336-337 |
| 6.4-year cycle | pig iron prices; 336 |
| 6.4-year cycle | stock prices (rail); 336 |
| 6.4-year cycle | tree-ring widths; 336 |
| 6.45-year cycle | aluminum production; 74 |
| 6.45-year cycle | bank discount rates; 74 |
| 6.45-year cycle | business activity; 74 |
| 6.45-year cycle | business failures; 74 |
| 6.45-year cycle | cotton prices; 74; 558; 591 |
| 6.45-year cycle | department store sales; 74 |
| 6.45-year cycle | economic affairs; 73 |
| 6.45-year cycle | pig iron prices; 74 |
| 6.45-year cycle | pig iron production; 74 |
| 6.45-year cycle | stock prices (rail); 74 |
| 6.5-year cycle | failures; 591-597 |
| 6.5-year cycle | lake levels; 137-138 |
| 6.524-year cycle | international battles; 691-692 |
| 6.58-year cycle | lake levels; 137-138 |
| 6.680-year cycle | post office revenues; 598; 600 |
| 6.93-year cycle | lake levels; 137-138 |
| 6.994-year cycle | international battles; 692 |
| 7.3-year cycle | sunspots; 270 |
| 7.304-year cycle | international battles; 692 |
| 7.333-year cycle | post office revenues; 598; 600 |
| 7.5-year cycle | public utility company sales; 27-29 |
| 7.5-year cycle | ton miles (Canadian Pacific Railway); 314; 359; 364-367 |
| 7.59-year cycle | lake levels; 137-138 |
| 7.6-year cycle | barometric pressure; 124-125 |
| 7.6-year cycle | sunspots; 270 |
| 7.670-year cycle | international battles; 692 |
| 7.0-year cycle | stock prices; 411 |
| 7.7-year cycle | stock prices; 411 |
| 7.80-year cycle | stock prices (railroad); 507 |
| 7.895-year cycle | post office revenues; 598; 600 |
| 7.94-year cycle | stock prices (railroad); 403; 507; 512; 514-518 |
| 7.95-year cycle | stock prices (railroad); 507 |
| 8-year cycle | cigarette production; 56-57; 313; 338-339 |
| 8-year cycle | crop yields; 56-57 |
| 8-year cycle | eggs; purchasing power of; 56-57 |
| 8-year cycle | Goodyear Tire and Rubber Company sales; 56-58 |
| 8-year cycle | lynx abundance; 56-58 |
| 8-year cycle | pig iron prices; 56-58 |
| 8-year cycle | rainfall; 56-57 |
| 8-year cycle | sales of Company G; 56-57 |
| 8-year cycle | steel ingot production; 56-57 |
| 8-year cycle | stock prices (railroad); 56-57 |
| 8-year cycle | sunspots; alternate cycles reversed; 56-57 |
| 8-year cycle | war; 692 |
| 8-year cycle | wholesale prices; 56-57 |
| 8- or 10-year cycle | lynx abundance; 83 |
| 8.1-year cycle | sunspots; 270 |
| 8.1667-year cycle | stock prices (combined); 507 |
| 8.1667-year cycle | stock prices (rail); 507 |
| 8.199-year cycle | international battles; 692 |
| 8.2-year cycle | stock prices; 411; 428-429 |
| 8.3-year cycle | patents issued; 91; 615-619 |
| 8.33-year cycle | stock prices (railroad); 507 |
| 8.36-year cycle | sunspots; 270 |
| 8.39-year cycle | stock prices; 514-518 |
| 8.39-year cycle | stock prices (railroad); 403; 507; 512 |
| 8.39-year cycle | war; 692 |
| 8.39-8.46-year cycle | lake levels; 137-138 |
| 8.4-year cycle | sunspots; 270 |
| 8.5-year cycle | copper prices; 519 |
| 8.5-year cycle | pig iron prices; 91; 519; 527 |
| 8.5-year cycle | stock prices; 403; 519 |
| 8.5-year cycle | sunspots; 270 |
| 8.53-year cycle | pig iron prices; 533-543 |
| 8.594-year cycle | international battles; 692 |
| 8.60-year cycle | copper prices; 93 |
| 8.684-year cycle | post office revenues; 598; 600 |
| 8.7-year cycle | sunspots; 270 |
| 8.76-year cycle | sunspots; 63; 270 |
| 8.771-year cycle | international battles; 692 |
| 8.8-year cycle | international and civil war battles (war); 72; 633-637; 639 |
| 8.8-year cycle | sunspots; 63; 270 |
| 8.85-year cycle | tree-ring widths; 63 |
| 8.9-year cycle | pig iron prices; 63 |
| 8.94-year cycle | sunspots; 63; 270 |
| 8.95-year cycle | lead production; 100 |
| 8.96-year cycle | death rates; 100 |
| 8.97-year cycle | gold production; 100 |
| 8.98-year cycle | deposits of all banks; 100 |
| 9-year cycle | Bank of France discounts; 100 |
| 9-year cycle | birth; marriage; and death-rates; 100 |
| 9-year cycle | business activity; 100 |
| 9-year cycle | capital exports; 100 |
| 9-year cycle | capital goods of heavy industry; 103 |
| 9-year cycle | church membership; 85; 101; 601; 603-608 |
| 9-year cycle | commercial crises; 100 |
| 9-year cycle | Congregational Church new members; 101 |
| 9-year cycle | cotton acreage; 86 |
| 9-year cycle | cotton prices; 101 |
| 9-year cycle | grasshoppers; 279 |
| 9-year cycle | industrial ordinary shares; 101 |
| 9-year cycle | lynx abundance; 96; 101 |
| 9-year cycle | Methodist Church new members; 101 |
| 9-year cycle | pig iron; 347 |
| 9-year cycle | pig iron prices; 47; 83 |
| 9-year cycle | Presbyterian Church new members; 85; 101 |
| 9-year cycle | production; 100 |
| 9-year cycle | sales figures; 84 |
| 9-year cycle | sales of Company B; 101 |
| 9-year cycle | sheep prices; 101 |
| 9-year cycle | stock prices; 22-24; 84 |
| 9-year cycle | ton miles (Canadian Pacific Railway); 101 |
| 9-year cycle | venereal disease; 101; 291 |
| 9-year cycle | wholesale prices; 22-23; 84 |
| 9-year cycle | woodcock abundance; 101 |
| 9-10-year cycle | bank discounts; 83 |
| 9-10-year cycle | births; deaths; and marriages; 83 |
| 9-10-year cycle | commercial crises; 83 |
| 9.01-year cycle | barley for grain acreage; 101 |
| 9.01-year cycle | barley for grain production; 102 |
| 9.01-year cycle | cattle; 102 |
| 9.01-year cycle | cotton acreage harvested; 102 |
| 9.01-year cycle | cows kept for milk; 102 |
| 9.01-year cycle | Irish potato production; 101 |
| 9.01-year cycle | rye acreage harvested; 101 |
| 9.01-year cycle | rye production; 101 |
| 9.02-year cycle | pig iron shipments; 102 |
| 9.04-year cycle | life insurance sales; 102 |
| 9.05-year cycle | coal (anthracite) production; 102 |
| 9.05-year cycle | wholesale sugar prices; 102 |
| 9.1-year cycle | corn acreage harvested; 102 |
| 9.1-year cycle | solar constant values; 360 |
| 9.1-year cycle | sunspot numbers; alternate cycles reversed; 86 |
| 9.1-year cycle | tree rings; 102; 434 |
| 9.11-year cycle | sunspot numbers; alternate cycles reversed; 102 |
| 9.13-year cycle | coal (bituminous) production; 102 |
| 9.13-year cycle | steel ingots and steel for castings; 102 |
| 9.14-year cycle | crude petroleum production; 102 |
| 9.17-year cycle | patents issued; 90; 93; 103; 615; 619 |
| 9.1781-year cycle | stock prices; 442 |
| 9.18-year cycle | stock prices (combined ); 90; |
| 9.18-year cycle | stock prices (industrial); 90; 103 |
| 9.18-year cycle | stock prices (rail); 90; 103; 507; 509; 512; 514-518 |
| 9.18-year cycle | ton miles (Canadian Pacific Railway); 314 |
| 9.2-year cycle | British consol prices; 103 |
| 9.2-year cycle | copper prices; 291 |
| 9.2-year cycle | cows on farms; 431; 434 |
| 9.2-year cycle | crops; 104 |
| 9.2-year cycle | electric potential gradient; 103 |
| 9.2-year cycle | failures; 90; 103; 291; 431; 434; 586-597 |
| 9.2-year cycle | grasshoppers; 90; 92; 103; 279; 401; 431; 434 |
| 9.2-year cycle | lake levels; 103; 137-138 |
| 9.2-year cycle | partridge abundance; 103 |
| 9.2-year cycle | patents issued; 90; 93 |
| 9.2-year cycle | pig iron prices; 47; 82; 86; 90-91; 103; 291; 431; 434; 527; 533-543 |
| 9.2-year cycle | stock market behavior; 504; 506 |
| 9.2-year cycle | stock prices; 50-5 1; 84; 401; 421; 435; 446-448; 522; 525-526 |
| 9.2-year cycle | stock prices (combined); 89-90 |
| 9.2-year cycle | stock prices (industrial); 291 |
| 9.2-year cycle | stock prices (railroad); 291 |
| 9.2-year cycle | sunspot numbers; 291-292 |
| 9.2-year cycle | tree rings (growth); 88-89; 103; 104; 291-292; 434 |
| 9.2-year cycle | varves; 103 |
| 9.2-year cycle | wholesale prices; 84; 88-89; 103 |
| 9.225-year cycle | stock prices; 447; 450; 453-455 |
| 9.225-year cycle | stock prices (combined); 90; 104; 431; 434 |
| 9.231-year cycle | bond yields; 104 |
| 9.25-year cycle | automobile sales; 104 |
| 9.25-year cycle | copper share prices; 104 |
| 9.25-year cycle | Lewes River early closing; 104 |
| 9.25-year cycle | Lewes River closed days; 104 |
| 9.25-year cycle | volcanic eruptions; 127 |
| 9.26-year cycle | cattle on farms; 431; 434 |
| 9.26-year cycle | lead (pig) prices; 104 |
| 9.270-year cycle | post office revenues; 598; 600 |
| 9.28-year cycle | copper prices; 82; 86; 93; 104; 431; 434 |
| 9.2- or 9.3-year cycle | grasshoppers; 86 |
| 9.2- or 9.3-year cycle | sunspot numbers; 86 |
| 9.3-year cycle | climatic variations; 104 |
| 9.3-year cycle | production of manufacturing; 104; 431; 434 |
| 9.3-year cycle | sales of a manufacturing company; 93 |
| 9.3-year cycle | sea currents; 104 |
| 9.3-year cycle | sunspot numbers; 104; 270; 431; 434 |
| 9.3-year cycle | wheat prices; 292; 431; 434 |
| 9.305-year cycle | tides; 104 |
| 9.31-year cycle | wheat prices; 104 |
| 9.33-year cycle | sales of a manufacturing company; 104; 431; 434 |
| 9.33-year cycle | wholesale price index; all commodities; 104 |
| 9.34-year cycle | silver mine production; 104 |
| 9.37-year cycle | sweet potato acreage harvested; 105 |
| 9.4-year cycle | tree-ring width; 105 |
| 9.4-year cycle | varves; 105 |
| 9.41-year cycle | sugar prices; 105 |
| 9.44-year cycle | cotton production; 105 |
| 9.46-year cycle | cheese consumption; 105 |
| 9.47-year cycle | cotton prices; 105 |
| 9.48-year cycle | sheep value; 105 |
| 9.4- or 9.5-year cycle | cotton production; 94 |
| 9.4- or 9.5-year cycle | rainfall; 94 |
| 9.4- or 9.5-year cycle | weather; 94 |
| 9.5-year cycle | barometric pressure; 105 |
| 9.5-year cycle | climate; 105 |
| 9.5-year cycle | floods; Nile; 105 |
| 9.5-year cycle | moon variation; 96 |
| 9.5-year cycle | rainfall; 105 |
| 9.5-year cycle | wholesale prices; 84 |
| 9.53-year cycle | tree ring growth; 105 |
| 9.54-year cycle | barometric pressure; 105 |
| 9.554-year cycle | international battles; 692 |
| 9.58-year cycle | wheat production; 95; 106 |
| 9.5986-year cycle | international battles; 106; 693 |
| 9.6- (9 2/3-) year cycle | barometric pressure; 55 |
| 9.6- (9 2/3-) year cycle | biological phenomena; 279; 314 |
| 9.6- (9 2/3-) year cycle | caterpillar (tent) abundance; 53; 55; 107 |
| 9.6- (9 2/3-) year cycle | chinch bug abundance; 53; 55; 96; 106; 288 |
| 9.6- (9 2/3-) year cycle | coyote abundance; 53; 55; 107 |
| 9.6- (9 2/3-) year cycle | egg abundance of hawk owl; 106 |
| 9.6- (9 2/3-) year cycle | financial crises in Great Britain; 53; 83; 95; 106 |
| 9.6- (9 2/3-) year cycle | fisher abundance; 53 |
| 9.6- (9 2/3-) year cycle | grouse abundance; 53 |
| 9.6- (9 2/3-) year cycle | hawk abundance; 53; 106 |
| 9.6- (9 2/3-) year cycle | human heart disease; 53; 55; 107 |
| 9.6- (9 2/3-) year cycle | international battles; 53; 55; 97; 602; 627; 739 |
| 9.6- (9 2/3-) year cycle | lynx abundance; 40-41; 53; 55; 58; 96; 106; 278-279; 288-289 |
| 9.6- (9 2/3-) year cycle | mammals; 288 |
| 9.6- (9 2/3-) year cycle | marten abundance; 53; 55; 107 |
| 9.6- (9 2/3-) year cycle | mink abundance; 53; 55; 107 |
| 9.6- (9 2/3-) year cycle | muskrat abundance; 53; 55; 107 |
| 9.6- (9 2/3-) year cycle | owl abundance; 53; 106 |
| 9.6- (9 2/3-) year cycle | ozone content; 53; 55; 107 |
| 9.6- (9 2/3-) year cycle | partridge abundance; 53; 106 |
| 9.6- (9 2/3-) year cycle | precipitation; 53; 55 |
| 9.6- (9 2/3-) year cycle | rabbit abundance; 53; 55 |
| 9.6- (9 2/3-) year cycle | rainfall; 55; 124; 126 |
| 9.6- (9 2/3-) year cycle | river run-off; 53; 55; 107 |
| 9.6- (9 2/3-) year cycle | salmon; 288 |
| 9.6- (9 2/3-) year cycle | salmon abundance; 53; 55; 84; 106 |
| 9.6- (9 2/3-) year cycle | salmon catches; 53 |
| 9.6- (9 2/3-) year cycle | snowshoe rabbit abundance; 106 |
| 9.6- (9 2/3-) year cycle | storm track shifts; 53; 106 |
| 9.6- (9 2/3-) year cycle | tick abundance; 53; 106 |
| 9.6- (9 2/3-) year cycle | trade peaks in Great Britain; 83 |
| 9.6- (9 2/3-) year cycle | tree-ring widths; 53; 55; 106; 288 |
| 9.6- (9 2/3-) year cycle | tularemia; 53; 106 |
| 9.6- (9 2/3-) year cycle | U-magnetic value; 53; 55; 106 |
| 9.6- (9 2/3-) year cycle | varves; 107 |
| 9.6- (9 2/3-) year cycle | varying hare; 288 |
| 9.6- (9 2/3-) year cycle | war; 53; 55; 97; 602; 627; 717-724; 739 |
| 9.6- (9 2/3-) year cycle | weather; 288 |
| 9.6- (9 2/3-) year cycle | wheat acreage; 53; 55; 314; 385-387 |
| 9.6- (9 2/3-) year cycle | wheat acreage harvested; 95-96; 106 |
| 9.6- (9 2/3-) year cycle | wheat acreage planted; 95; 106 |
| 9.6- (9 2/3-) year cycle | wheat prices; 55 |
| 9.6- (9 2/3-) year cycle | wildlife; 53; 84 |
| 9.65-year cycle | cotton prices; 53; 95; 107 |
| 9.7-year cycle | barometric pressure; 107 |
| 9.7-year cycle | colored fox abundance; 107 |
| 9.7-year cycle | cross fox abundance; 107 |
| 9.7-year cycle | fisher abundance; 107 |
| 9.7-year cycle | goshawk abundance; 107 |
| 9.7-year cycle | Peace River opening dates; 107 |
| 9.7-year cycle | silver fox abundance; 107 |
| 9.7-year cycle | skunk abundance; 107 |
| 9.7-year cycle | red fox abundance; 107 |
| 9.7-year cycle | sunspot numbers; alternate cycles reversed; 96 |
| 9.7-year cycle | timber wolf abundance; 107 |
| 9.708-year cycle | sunspot numbers; alternate cycles reversed; 107 |
| 9.75- (9 3/4-) year cycle | lynx abundance; 8-9; 27 |
| 9.75- (9 3/4-) year cycle | salmon population; 11 |
| 9.75- (9 3/4-) year cycle | wheat prices; 83; 108 |
| 9.77-year cycle | temperature; 108 |
| 9.78-year cycle | cigarette production; 108 |
| 9.78-year cycle | sweet potato production; 108 |
| 9.79-year cycle | wholesale prices; 108 |
| 9.86-year cycle | precipitation; 108 |
| 9.9-year cycle | bank deposits; 109 |
| 9.9-year cycle | copper mine products; 109 |
| 9.9-year cycle | cotton prices; 109 |
| 9.9-year cycle | lynx abundance; 96; 109 |
| 9.9-year cycle | prairie chicken abundance; 109 |
| 9.9-year cycle | precipitation; 109 |
| 9.9-year cycle | post office revenues; 109 |
| 9.9-year cycle | ruffed grouse; 109 |
| 9.9-year cycle | sunspot numbers; 98; 109; 270 |
| 9.9-year cycle | varves; 108 |
| 9.9-year cycle | waxwing abundance; 109 |
| 9.91-year cycle | cotton prices; 108 |
| 9.91-year cycle | lynx abundance; 108 |
| 9.93-year cycle | prairie chicken abundance; 108 |
| 9.93-year cycle | ruffed grouse abundance; 108 |
| 9.93-year cycle | sunspot numbers; 98-99; 108; 270 |
| 9.93-year cycle | tree rings; 108 |
| 9.93-year cycle | varves; 108 |
| 9.93-year cycle | waxwing abundance; 108 |
| 9.94-year cycle | post office revenues; 108 |
| 10-year cycle | bank deposits; 108 |
| 10-year cycle | caterpillars; 37 |
| 10-year cycle | copper mines production; 108 |
| 10-year cycle | ozone; 37 |
| 10-year cycle | rabbit abundance; 37 |
| 10-year cycle | rainfall; 37 |
| 10-year cycle | salmon (Atlantic); 37 |
| 10-year cycle | sunspots; 270 |
| 10- or 11-year cycle | caterpillar (tent) abundance; 10 |
| 10-12-year cycle | wheat and barley bumper crops; 266 |
| 10.239-year cycle | international battles; 692 |
| 10.3-year cycle | stock prices; 411; 428; 429 |
| 10.3876-year cycle | stock prices; 442 |
| 10.444-year cycle | commercial crises; 268 |
| 10.45-year cycle | sunspots; 268 |
| 10.59-year cycle | sunspots; 213; 270 |
| 10.8-year cycle | stock prices (industrial); 266 |
| 10.8- to 11.4-year cycles | sunspots; 265-275 |
| 10.81-year cycle | lead production; 266 |
| 10.83-year cycle | stock prices (combined); 266 |
| 10.92-year cycle | Reichbank clearings; 266 |
| 10.93-year cycle | wheat prices; 266-267 |
| 10.94-year cycle | earthquakes; 126 |
| 10.96-year cycle | earthquakes; 129 |
| 10.98-year cycle | cotton prices; 266 |
| 10.99-year cycle | corn acreage harvested; 266 |
| 10.99-year cycle | sheep value; 266 |
| 11-year cycle | automobile production; 266 |
| 11-year cycle | business activity; 266 |
| 11-year cycle | commercial crises; 267 |
| 11-year cycle | corn prices; 565 |
| 11-year cycle | cotton prices; 266-267 |
| 11-year cycle | crop yields; 266 |
| 11-year cycle | earthquakes; 117-118; 129-130 |
| 11-year cycle | famine and drought; 267 |
| 11-year cycle | lake levels; 139 |
| 11-year cycle | laxative sales; 267 |
| 11-year cycle | post office revenues; 266; 598; 600 |
| 11-year cycle | sunspot numbers; 118; 196-198; 217-218; 224; 232; 237; 251; 741 |
| 11-year cycle | trade and speculation; 268 |
| 11-year cycle | tree rings; 125 |
| 11-year cycle | U.S. Steel Corp. earnings; 266 |
| 11-year cycle | varves; 125 |
| 11-year cycle | wheat prices; 266 |
| 11-year cycle | wheat yields; 266 |
| 11.094-year cycle | sunspot numbers; 196; 213 |
| 11.1-year cycle | bank deposits; 266 |
| 11.1-year cycle | mass human excitability; 268; 272; 273 |
| 11.1-year cycle | pig iron prices; 266 |
| 11.1-year cycle | sunspot maxima; 196-198 |
| 11.1-year cycle | sunspots; 201; 206; 215; 221-222 |
| 11.11-year cycle | grain prices; 266; 270 |
| 11.11-year cycle | mass human excitability; 267; 272 |
| 11.11-year cycle | sunspots; 96; 117; 121; 241; 246; 254-259; 261; 264-275 |
| 11.11-year cycle | wrought iron prices; 113 |
| 11.13-year cycle | sunspots; 270 |
| 11.14-year cycle | business activity; 266 |
| 11.142- (11 1/7)-year cycle | war; 267 |
| 11.15-year cycle | sunspots; 273 |
| 11.17-year cycle | sunspots; 270 |
| 11.19-year cycle | crude petroleum production; 267 |
| 11+ (SS-length) cycle | business activity; 266 |
| 11+ (SS-length) cycle | corn production; 266 |
| 11+ (SS-length) cycle | economic prosperity and international crises; 267 |
| 11+ (SS-length) cycle | field pea production; 266 |
| 11+ (SS-length) cycle | fisheries; value of; 267 |
| 11+ (SS-length) cycle | grain prices; 266 |
| 11+ (SS-length) cycle | grain production; 266 |
| 11+ (SS-length) cycle | human reactions in wars; 627 |
| 11+ (SS-length) cycle | military and political activity; 627 |
| 11+ (SS-length) cycle | loans for residential mortgages; 266 |
| 11+ (SS-length) cycle | marriage rates; 267 |
| 11+ (SS-length) cycle | mineral physical production; 267; 272 |
| 11+ (SS-length) cycle | panics in business; 267 |
| 11+ (SS-length) cycle | shipwrecks; 267 |
| 11+ (SS-length) cycle | stock prices; 266 |
| 11+ (SS-length) cycle | sunspot numbers; 23 |
| 11+ (SS-length) cycle | terrestrial magnetism; 23-24 |
| 11+ (SS-length) cycle | tree-ring variation; 25 |
| 11+ (SS-length) cycle | wheat prices; 266 |
| 11+ (SS-length) cycle | wholesale commodity prices; 266 |
| 11.2-year cycle | manufacturing physical production; 267; 272 |
| 11.2-year cycle | pig iron production; 267 |
| 11.2-year cycle | war; 267; 627; 695; 708-709; 717 |
| 11.204-year cycle | war; 691-693 |
| 11.241-year cycle | international battles; 267; 693 |
| 11.245-year cycle | international wars; 627; 717 |
| 11.25-year cycle | sunspots; 270 |
| 11.25-year cycle | tree rings; 302 |
| 11.30-year cycle | wholesale commodity prices; 266 |
| 11.37-year cycle | sunspots; 270 |
| 11.38-year cycle | cotton production; 266 |
| 11.4-year cycle | sunspots; 270 |
| 11.43-year cycle | lake levels; 137-138 |
| 11.4530-year cycle | stock prices; 442 |
| 11.6-year cycle | stock prices; 411 |
| 11.73-year cycle | sunspots; 213-215 |
| 12.1-year cycle | international battles; 627 |
| 12.159-year cycle | international battles; 692 |
| 12.3-year cycle | international battles; 602; 627; 717-724 |
| 12.34-year cycle | international battles; 739 |
| 12.3456-year cycle | international battles; 693 |
| 12.35-year cycle | international battle index; 97 |
| 12.406-year cycle | post office revenues; 598; 600 |
| 12.8-year cycle | stock prices; 411 |
| 12.9-year cycle | sunspots; 270 |
| 13.0-year cycle | sunspots; 270 |
| 13.210-year cycle | international battles; 692 |
| 13.5-year cycle | sunspots; 270 |
| 13.6735-year cycle | stock prices; 442 |
| 13.51-13.68-year cycle | lake levels; 137-138 |
| 14- to 17-year cycle | Vesuvius; 127 |
| 14.172-year cycle | international battles; 692 |
| 14.732-year cycle | post office revenues; 598; 600 |
| 14.8-year cycle | purchasing power of beef cattle; 12 |
| 15-year cycle | grasshopper abundance; 292 |
| 15.507-year cycle | international battles; 692 |
| 15.5814-year cycle | stock prices; 442 |
| 16.67- (16 2/3)-year cycle | coffee prices; 112-113; 280 |
| 16.67- (16 2/3)-year cycle | floods; Nile River; 72; 112-113; 280 |
| 16.67- (16 2/3)-year cycle | iron prices; 72 |
| 16.67- (16 2/3)-year cycle | population; 344 |
| 16.67- (16 2/3)-year cycle | tree rings; 72; 112-113; 279-280; 298 |
| 16.67- (16 2/3)-year cycle | wrought iron prices; 46-47; 68; 70; 72; 112-113; 280; 298; 738-739 |
| 17-year cycle | building permits; 167 |
| 17-year cycle | building construction; 167 |
| 17-year cycle | cicada; 167 |
| 17-year cycle | cattle prices; 167 |
| 17-year cycle | cattle supply and demand; 167 |
| 17-year cycle | cigarette stock prices; 167 |
| 17-year cycle | poultry product prices; 167 |
| 17-year cycle | precipitation; 166-169 |
| 17-year cycle | rainfall; 167 |
| 17-year cycle | solar constant; 167 |
| 17-year cycle | sunspot numbers (reversing); 167 |
| 17-year cycle | temperature; 166-169 |
| 17-year cycle | weather; 167; 351 |
| 17-year cycle | wheat prices; 351 |
| 17-18-year cycle | building transport; 167 |
| 17-18-year cycle | deeds recorded; 167 |
| 17-18-year cycle | real estate activity; 167 |
| 17.05-year cycle | interest rates; 167 |
| 17.16 (17 1/6)-year cycle | permits per capita; 167 |
| 17.2-year cycle | population; 166-169; 620 |
| 17.2-year cycle | stock prices; 166-169 |
| 17.2-year cycle | tree rings; 298 |
| 17.25-year cycle | cotton prices; 166-169 |
| 17.3-year cycle | flood stages; Nile River; 58 |
| 17.323-year cycle | varves; 44-45; 47; 141-171 |
| 17.328-year cycle | varves; 156 |
| 17.33- (17 1/3)-year cycle | commodity prices; 167 |
| 17.33- (17 1/3)-year cycle | cotton prices; 72; 351 |
| 17.33- (17 1/3)-year cycle | floods; Nile River; 72; 113 |
| 17.33- (17 1/3)-year cycle | historical change; 167 |
| 17.33- (17 1/3)-year cycle | lake levels; 167 |
| 17.33- (17 1/3)-year cycle | population; 72 |
| 17.33- (17 1/3)-year cycle | precipitation; 72 |
| 17.33- (17 1/3)-year cycle | stock prices; 72 |
| 17.33- (17 1/3)-year cycle | stock prices (industrial); 167 |
| 17.33- (17 1/3)-year cycle | sunspots; alternate cycles reversed; 72; 166-169 |
| 17.33- (17 1/3)-year cycle | temperature; 72 |
| 17.33- (17 1/3)-year cycle | varves; 54; 58; 72; 118; 140-171 |
| 17.33- (17 1/3)-year cycle | war; 602 |
| 17.33- (17 1/3)-year cycle | wheat prices; 72; 166-169 |
| 17.37-year cycle | flood stages; Nile River; 142; 161; 166-169 |
| 17.398-year cycle | international battles; 691-692 |
| 17.66-year cycle | earthquakes; 63 |
| 17.66-year cycle | sunspots; alternate cycles reversed; 63 |
| 17.67- (17 2/3 )-year cycle | earthquakes; 648-650 |
| 17.67- (17 2/3 )-year cycle | failures; 544-545; 648-650 |
| 17.67- (17 2/3 )-year cycle | sunspots; alternate cycles reversed; 648 |
| 17.69-year cycle | pig iron prices; 63 |
| 17.7-year cycle | coal (bituminous) production; 72 |
| 17.7-year cycle | cotton prices; 72 |
| 17.7-year cycle | earthquakes; 72 |
| 17.7-year cycle | failures; 72 |
| 17.7-year cycle | panics; 72 |
| 17.7-year cycle | pig iron prices; 72 |
| 17.7-year cycle | temperature; 72 |
| 17.7-year cycle | tree rings; 72 |
| 17.7-year cycle | war battles; 72; 601-602; 621-686; 691 |
| 17.71-year cycle | war; 648-650; 693 |
| 17.724-year cycle | variable star Scorpius V 381; 63; 648 |
| 17.728-year cycle | war; 627 |
| 17.73-year cycle | war; 63 |
| 17.75- (17 3/4)-year cycle | building permits; 648 |
| 17.75- (17 3/4)-year cycle | coal (bituminous) production; 648; 650 |
| 17.75- (17 3/4)-year cycle | cotton prices; 63; 280; 527; 554-557; 581; 611; 648-650 |
| 17.75- (17 3/4)-year cycle | failures; 63; 350; 352-353; 529; 581-597; 611 |
| 17.75- (17 3/4)-year cycle | international battles; 611 |
| 17.75- (17 3/4)-year cycle | mail-order house; 63 |
| 17.75- (17 3/4)-year cycle | panics; 581 |
| 17.75- (17 3/4)-year cycle | pig iron prices; 280; 350-353; 527; 544-553; 581; 611; 648-650 |
| 17.75- (17 3/4)-year cycle | stock prices; 611; 648 |
| 17.75- (17 3/4)-year cycle | stock prices (industrial); 351; 581 |
| 17.75- (17 3/4)-year cycle | sunspots; alternate cycles reversed; 581 |
| 17.75- (17 3/4)-year cycle | tree rings; 63; 113; 280; 308; 351; 354; 544-545; 581; 648-650 |
| 17.75- (17 3/4)-year cycle | war; 280; 627 |
| 17.78-year cycle | stocks (industrial); 63 |
| 17.8-year cycle | stock prices (industrial); 648 |
| 17.83- (17 5/6)- year cycle | subdivision activity; 611; 648 |
| 17.9-year cycle | building activity; 611; 648 |
| 17.92-year cycle | sunspot numbers; alternate cycles reversed; 251-253 |
| 17.93- or 17.94-year cycle | sunspot numbers; alternate cycles reversed; 254 |
| 18-year cycle | bank credit; 648 |
| 18-year cycle | bricks; 444; 648 |
| 18-year cycle | building activity; 611 |
| 18-year cycle | building construction; 648 |
| 18-year cycle | building materials; 444; 648 |
| 18-year cycle | building permits; 444; 648 |
| 18-year cycle | coal consumption and production; 444 |
| 18-year cycle | fir timber imported; 444; 648 |
| 18-year cycle | furniture; 347 |
| 18-year cycle | loans and discounts; 347-349 |
| 18-year cycle | lumber production; 347 |
| 18-year cycle | lynx abundance; 27 |
| 18-year cycle | panics; 443-444; 648-650 |
| 18-year cycle | pig iron consumption and production; 444 |
| 18-year cycle | purchasing power; 648 |
| 18-year cycle | railroad expenditures; 648 |
| 18-year cycle | railroad freight revenue; 648 |
| 18-year cycle | railroad receivership; 648 |
| 18-year cycle | real estate activity; 611; 648 |
| 18-year cycle | sheet glass retained; 444; 648 |
| 18-year cycle | stock prices; 648 |
| 18-year cycle | stock prices (industrial); 648 |
| 18-year cycle | stock prices (railroad); 648 |
| 18-year cycle | sunspot numbers; alternate cycles reversed; 238; 251; 351; 354 |
| 18-year cycle | temperature; 648-650 |
| 18-year cycle | tiles; 444; 648 |
| 18-20-year cycle | buildings demolished; 444 |
| 18.2-year cycle | building activity and construction; 54; 612 |
| 18.2-year cycle | floods; Nile River; 54 |
| 18.2-year cycle | glaciers; 611 |
| 18.2-year cycle | immigration; 54; 442-443; 445; 601; 609-614 |
| 18.2-year cycle | industrial companies; 54 |
| 18.2-year cycle | loans and discounts; 54 |
| 18.2-year cycle | marriages; 54; 601; 620 |
| 18.2-year cycle | natural science phenomena; 611 |
| 18.2-year cycle | panics; 54 |
| 18.2-year cycle | pig iron; 54 |
| 18.2-year cycle | public utility company sales; 54 |
| 18.2-year cycle | real estate activity; 54; 443-444; 612 |
| 18.2-year cycle | sales of an industrial company; 54 |
| 18.2-year cycle | stock prices; 401; 435-448 |
| 18.2-year cycle | stock prices (industrial); 54 |
| 18.2-year cycle | sunspots; 611 |
| 18.2-year cycle | sunspots; alternate cycles reversed; 54; 443; 612 |
| 18.2-year cycle | tree rings; 54; 113; 298; 443-444; 611-612 |
| 18.2-18.3-year cycle | construction; 72 |
| 18.2-18.3-year cycle | economic phenomena; 601 |
| 18.2-18.3-year cycle | floods; Nile River; 72 |
| 18.2-18.3-year cycle | immigration; 72 |
| 18.2-18.3-year cycle | an industrial company; 72 |
| 18.2-18.3-year cycle | loans and discounts; 72 |
| 18.2-18.3-year cycle | marriages; 72 |
| 18.2-18.3-year cycle | panics; 72 |
| 18.2-18.3-year cycle | pig iron; 72 |
| 18.2-18.3-year cycle | public utility company; 72 |
| 18.2-18.3-year cycle | real estate activity; 72 |
| 18.2-18.3-year cycle | stocks (industrial); 72 |
| 18.2-18.3-year cycle | sunspots; alternate cycles reversed; 72 |
| 18.2-18.3-year cycle | tree rings; 72 |
| 18.32-year cycle | flood stages; Nile River; 443 |
| 18.33- (18 1/3)- year cycle | building activity and construction; 26; 343-345; 349; 443-444 |
| 18.33- (18 1/3)- year cycle | building permits; 444; 611 |
| 18.33- (18 1/3)- year cycle | buildings (residential); 351; 355 |
| 18.33- (18 1/3)- year cycle | discounts and loans; 443-444 |
| 18.33- (18 1/3)- year cycle | freight traffic (Canadian Pacific Railway); 444 |
| 18.33- (18 1/3)- year cycle | furniture produced; 444 |
| 18.33- (18 1/3)- year cycle | an industrial company; 443 |
| 18.33- (18 1/3)- year cycle | lumber production; 444 |
| 18.33- (18 1/3)- year cycle | marriage rates; 343; 345; 349; 443 |
| 18.33- (18 1/3)- year cycle | panics; 444 |
| 18.33- (18 1/3)- year cycle | pig iron; 443-444 |
| 18.33- (18 1/3)- year cycle | pig iron production; 347; 444 |
| 18.33- (18 1/3)- year cycle | production; 314; 343-357 |
| 18.33- (18 1/3)- year cycle | real estate activity; 17-18; 343; 349; 353-354; 611 |
| 18.33- (18 1/3)- year cycle | residential permits; 444 |
| 18.33- (18 1/3)- year cycle | sales of an industrial company; 347; 349 |
| 18.33- (18 1/3)- year cycle | sales of a public utility company; 27-29; 443-444; 611 |
| 18.33- (18 1/3)- year cycle | stock prices; 23; 26; 347-349 |
| 18.33- (18 1/3)- year cycle | varves; 26 |
| 18.33- (18 1/3)- year cycle | wheat acreage; 345; 349; 444; 611 |
| 18.3562-year cycle | stock prices; 442 |
| 18.539-year cycle | post office revenues; 598; 600 |
| 18.6-year cycle | axis of earth; 748 |
| 19-year cycle | earthquakes; 127 |
| 19-year cycle | stock prices; 522; 525 |
| 19.25- (19 1/4)- year cycle | stock prices; 351 |
| 19.4-year cycle | stock prices (industrial); 504; 748 |
| 19.4-year cycle | stock prices (railroad); 350-351; 504; 748 |
| 19.455-year cycle | international battles; 692 |
| 19.5- (19 1/2)-year cycle | war; 602 |
| 19.7-year cycle | stock prices; 421; 425; 428 |
| 19.9-year cycle | wheat prices; 351 |
| 20-year cycle | stock prices (industrial); 748 |
| 20-year cycle | stock prices (railroad); 748 |
| 20.8-year cycle | sunspots alternate cycles reversed; 748 |
| 21-year cycle | grasshoppers; 291 |
| 21.75- (21 3/4 )-year cycle | cotton prices; 271 |
| 21.95-year cycle | international battles; 247; 627 |
| 21.98-year cycle | war battles; 271; 693 |
| 22-year cycle | advertising effectiveness. 271 |
| 22-year cycle | building activity; 271 |
| 22-year cycle | famine; 271 |
| 22-year cycle | patents issued; 271; 615 |
| 22-year cycle | pig iron production; 271 |
| 22-year cycle | post office revenues; 271; 598; 600; 748 |
| 22-year cycle | sales of a drug company; 271 |
| 22-year cycle | stock prices (combined); 271 |
| 22-year cycle | sunspots; 122 |
| 22-year cycle | sunspots; alternate cycles reversed; 120; 196; 241 |
| 22-year cycle | war; 626; 717 |
| 22-year cycle | wheat yield; 271 |
| 22-year cycle | wholesale commodity prices; 271 |
| 22- 23-year cycles | lake levels; 138-139 |
| 22-24-year cycle | suicide rates; 271 |
| 22.13-23.11-year cycle | lake levels; 137- 138 |
| 22.14- (22 1/7)-year cycle | international battles; 246-247; 627; 695; 708-709; 748 |
| 22.19-year cycle | double sunspot cycle; 247 |
| 22.2- (22 1/5 )-year cycle | advertising efficiency; 748 |
| 22.2- (22 1/5 )-year cycle | female ailments; 749 |
| 22.2- (22 1/5 )-year cycle | lynx abundance; 748 |
| 22.2- (22 1/5 )-year cycle | sunspot numbers; alternate cycles reversed; 238; 241; 612; 748; 758 |
| 22.2- (22 1/5 )-year cycle | wholesale prices; 748 |
| 22.22-year cycle | sunspots; alternate cycles reversed; 117; 120; 241-249; 251; 254-259; 262; 264-275 |
| 22.5-year cycle | horse prices; 271 |
| 22.67- (22 2/3 )-year cycle | advertising efficiency; 292 |
| 22.67- (22 2/3 )-year cycle | international battles; 292 |
| 22.67- (22 2/3 )-year cycle | grasshopper outbreaks; 279; 291-294 |
| 22.67- (22 2/3 )-year cycle | lynx abundance; 292 |
| 22.67- (22 2/3 )-year cycle | partridge; 279; 292; 295-297 |
| 22.67- (22 2/3 )-year cycle | postal receipts; 292 |
| 22.67- (22 2/3 )-year cycle | solar radiation; 295 |
| 22.67- (22 2/3 )-year cycle | sunspots; alternate cycles reversed; 292 |
| 22.67- (22 2/3 )-year cycle | wholesale prices; 292 |
| 22.75-year cycle | lake levels; 138 |
| 23-year cycle | lake levels; 292; 749 |
| 23-year cycle | river levels; 292; 749 |
| 23-year cycle | tree rings; 292; 749 |
| 23-year cycle | varves (rock deposit widths); 292; 749 |
| 23-year cycle | weather; 292; 749 |
| 23.3-year cycle | stock prices; 749 |
| 23.778-year cycle | war; 692-693 |
| 24-year cycle | wheat prices; 749 |
| 25-year cycle | building; 344 |
| 26.1-year cycle | stock prices (railroad); 749 |
| 26.2745-year cycle | stock prices; 442 |
| 27.966-year cycle | post office revenues; 598; 600 |
| 30-year cycle | building; 344 |
| 30-year cycle | stock prices (railroad); 749 |
| 30-year cycle | varves; 125 |
| 31.940-year cycle | international battles; 692 |
| 33-year cycle | wars and peace; 627 |
| 33.3- (33 1/3•)-year cycle | lake levels; 126 |
| 33.5-year cycle | varves; 151 |
| 33.55-year cycle | lake levels; 137-138 |
| 35-year cycle | harvests; 63 |
| 35-year cycle | immigration; 63 |
| 35-year cycle | lake levels; 240 |
| 35-year cycle | plant and tree growth; 63 |
| 35-year cycle | tree rings; 63 |
| 35-year cycle | rivers freezing; 240 |
| 35-year cycle | wine making; 240 |
| 35.2-year cycle | earthquakes; 63; 749 |
| 35.2-year cycle | lynx abundance; 63; 749 |
| 35.5-year cycle | weather; 63 |
| 35.9-year cycle | auroras; frequency of; 63 |
| 36-year cycle | barometric pressure; 63 |
| 36-year cycle | English consols value; 63 |
| 36-year cycle | manufacturing production; 63 |
| 36-year cycle | wheat prices; 63 |
| 36.5- (36 1/2 )-year cycle | floods; Nile River; 115 |
| 36.75- (36 3/4)-year cycle | cotton prices; 115 |
| 37-year cycle | auroras; frequency of; 115-116 |
| 37-year cycle | biological time series; 240 |
| 37-year cycle | earthquakes; 115-116 |
| 37-year cycle | sunspot (11-year variation of) cycle; 115-116 |
| 37-year cycle | floods; Nile River; 115-116 |
| 37-year cycle | pine growth; 115-116 |
| 37-year cycle | stock prices; 115 |
| 37-year cycle | sunspots; alternate cycles reversed; 119; 217; 234-240 |
| 37-year cycle | weather; 240 |
| 37-year cycle | winters; 115-116; 126 |
| 37-year cycle | wheat prices; 115-116 |
| 37.2-year cycle | auroras; frequency of; 115 |
| 37.4-year cycle | sunspots; 115; 218 |
| 37.5- (37 1/2 )-year cycle | stock prices; 749 |
| 37.5- (37 1/2 )-year cycle | sunspots; 115; 217-220 |
| 37.5- (37 1/2 )-year cycle | sunspots; alternate cycles reversed; 234-240 |
| 37.5- (37 1/2 )-year cycle | variation of length of the sunspot cycle; 749 |
| 37.5- (37 1/2 )-year cycle | wheat prices; 115 |
| 37.9-year cycle | wheat prices; 115 |
| 38.214-year cycle | international battles; 692 |
| 40.0-year cycle | stock prices; 749 |
| 41.7-year cycle | cotton prices; 299 |
| 42-year cycle | climate; 224 |
| 42-year cycle | cotton prices; 48; 50-51; 270 |
| 42-year cycle | prices; 224 |
| 42-year cycle | sunspot numbers; 119; 224; 270; 528 |
| 42-year cycle | tree rings; 270; 280; 299-303; 528 |
| 42-year cycle | wheat prices; 270; 528; 575 |
| 42.023-year cycle | tree ring widths; 225-226; 280; 299-303 |
| 42.5-year cycle | wheat prices; 299; 302 |
| 42.8-year cycle | sunspots; 225 |
| 44.000-year cycle | post office revenues; 598; 600 |
| 44.6667-year cycle | stock prices; 442 |
| 46-year cycle | droughts; 749 |
| 46-year cycle | lake levels; 749 |
| 46-year cycle | tree ring widths; 749 |
| 50-year cycle | commodity prices and wars; 627 |
| 50-year cycle | manufacturing production; 749 |
| 50-year cycle | wholesale prices; 749 |
| 50- to 60-year cycle | agricultural workers’ wages; 304 |
| 50- to 60-year cycle | bank deposits; 304 |
| 50- to 60-year cycle | Bank of France portfolio; 304 |
| 50- to 60-year cycle | coal consumption; 304 |
| 50- to 60-year cycle | coal production; 304 |
| 50- to 60-year cycle | coal miners’ wages; 304 |
| 50- to 60-year cycle | cotton acreage; 304 |
| 50- to 60-year cycle | copper prices; 304; 528 |
| 50- to 60-year cycle | exports; 304 |
| 50- to 60-year cycle | imports; 304 |
| 50- to 60-year cycle | interest rates; 304 |
| 50- to 60-year cycle | lead production; 304 |
| 50- to 60-year cycle | oat acreage; 304 |
| 50- to 60-year cycle | pig iron production; 304 |
| 50- to 60-year cycle | prices; 304 |
| 50- to 60-year cycle | ship building; 304 |
| 50- to 60-year cycle | textile workers’ wages; 304 |
| 50- to 60-year cycle | trade (foreign); 304 |
| 50- to 60-year cycle | war; 717 |
| 50- to 60-year cycle | wheat prices; 304 |
| 51.969-year cycle | varves; 164-165 |
| 53.500-year cycle | war; 691-692 |
| 54-year cycle | agricultural workers’ wages; 63 |
| 54-year cycle | bank deposits; 63 |
| 54-year cycle | coal consumption; 63 |
| 54-year cycle | coal production; 63 |
| 54-year cycle | consols (British) value; 63 |
| 54-year cycle | copper prices; 63; 528; 578-579 |
| 54-year cycle | cotton acreage; 63 |
| 54-year cycle | devaluation in England; 63 |
| 54-year cycle | economic affairs; 280; 304 |
| 54-year cycle | interest rates; 63 |
| 54-year cycle | lead production; 63 |
| 54-year cycle | oat acreage; 63 |
| 54-year cycle | pig iron production; 63 |
| 54-year cycle | prices; 63 |
| 54-year cycle | rent in France; 63 |
| 54-year cycle | river run off; 304 |
| 54-year cycle | ship building; 63 |
| 54-year cycle | textile workers; 63 |
| 54-year cycle | trade (foreign); 63 |
| 54-year cycle | tree rings; 63; 280; 304-307 |
| 54-year cycle | varves (sedimentary rock or mud deposits); 304 |
| 54-year cycle | wheat prices; 63; 528; 576-579 |
| 54.5-year cycle | stock prices (railroad); 749 |
| 54.6-year cycle | stock prices (railroad); 63 |
| 57-year cycle | international battles; 627; 691; 693; 695; 708; 711; 716 |
| 61.4-year cycle | international battles; 627 |
| 62-year cycle | elephant abundance; 10 |
| 66.5-year cycle | cotton prices; 749 |
| 67-year cycle | varves; 151 |
| 78.571-year cycle | post office revenues; 598; 600 |
| 79-year cycle | sunspot numbers; 221 |
| 80-year cycle | sunspots; 119; 198; 201; 206; 215; |
| 82.308-year cycle | international battles; 692 |
| 83-year cycle | sunspots; 221 |
| 83-year cycle | winters; 126 |
| 84-year cycle | social and political unrest; 627 |
| 84+ -year cycle | sunspot numbers; 221 |
| 89-year cycle | sunspots; 221 |
| 94.55-year cycle | lake levels; 137-138 |
| 95.7143-year cycle | stock prices; 442 |
| 100.0-year cycle | stock prices (railroad); 749 |
| 105-year cycle | women’s fashions; 63 |
| 117.857-year cycle | post office revenues; 598; 600 |
| 125.882-year cycle | international battles; 692 |
| 130-year cycle | earthquakes; 126 |
| 130-year cycle | volcanic eruptions; 126 |
| 142-year cycle | international battles; 63; 627; 693; 695; 708; 712; 714 |
| 150-year cycle | pig iron prices; 749 |
| 159-year cycle | pig iron prices; 63 |
| 170-year cycle | civil wars; 627 |
| 200-year cycle | sunspots; 119; 198; 201-216 |
| 300-year cycle | variation of length of sunspot cycle; 749 |
| 510-year cycle | civil wars; 627 |