|Two circular diagrams showing the division of the day and of the |
week, from a Carolingian manuscript (Clm 14456 fol. 71r) of St.
Emmeram Abbey. The day is divided into 24 hours, and each hour
into 4 puncta, 10 minuta and 40 momenta. Similarly, the week is
divided into seven days, and each day into 96 puncta, 240 minuta
and 960 momenta.
The earliest reference we have to the moment is from the 8th century writings of the Venerable Bede. Bede describes the system as 1 hour = 4 points = 10 minutes = 15 parts = 40 moments. Bede was referenced four centuries later by Bartholomeus Anglicus in his early encyclopedia De Proprietatibus Rerum (On the Properties of Things). Centuries after Bede's description, the moment was further divided into 60 ostents, although no such divisions could ever have been used in observation with equipment in use at the time. Source: Wikipedia