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CHAPTEE XXXVI.
ON THE FOUE MEASUEES OF TIME CALLED MANA.
Mana and pramdna mean measure. The four kinds
of measures are mentioned by Yakub Ibn Tarik in his
book Compositio Sphcerarum, but he did not know them
thoroughly, and, besides, the names are misspelled, if
this is not the fault of the copyists.
They are—
Saura-mdna, i.e. the solar measure.
Sdvana-mdna, i.e. the measure depending upon the rising {civil
measure).
Candra-mdna, i.e. the lunar measure.
Nakshatra-mdna, i.e. the lunar-station measure {sidereal mea¬
sure).
There are days of all four kinds of measure, days of
an individual nature, which, when compared with other
days, show a certain difference of measure. However,
the number 360 is common to all of them (360 days of
each class being a year). The civil days are used as a
gauge to determine thereby the other days.
As regards the saura-mdna, it is known that the solar Measure-
year has 365y%yg- civil days. Dividing this sum by w differ-''
360, or multiplying it by 10 seconds (= -g-Lg- day), you years'and°
get as the measure of the solar day 13-^'£-§-g~o civil day. "'■^^"
According to the Vishnu-Dharma, this is the time of Page 179.
the sun's passing his hhnkti.
The civil day, based on the sdvana-mdna, is here used
as the unit of a day, for the purpose of measuring
thereby the other kinds of days.
YOL, I, z