45:16 · In early Chinese writing this ideogram represented yin and yang, i.e. the fundamental dualism of reality. Compare with the more advanced form expressing the same philosophical approach, in Group 32.
    In the West this sign has long been an ideogram for the number 10 (from the Latin ). It has also been used to signify an hourglass and has, as a result, been used to mean time, and to mean hour. As a sign for hour is synonymous with .
    It is interesting to note that in early Chinese writing the number 10 was drawn , i.e. with the most important of all symbols for the Western philosophy of life. Therefore we may state: = 10 in the system , whereas = 10 in the system .