272 
G. Thibant —Vardha Mihira’s Panchasiddhdntihd. 
[No. 2, 
niimber of lunar months and savana days of the entire ynga. We 
multiply the kalpady-ahargana as formed above by 2,406,389 (= the 
number of the sidereal revolutions of the moon in a yuga), divide by 
^5,746,575 (= number of savana days), reject the quotient which ex¬ 
presses the complete revolutions and keep the remainder 65,157,822 which 
indicates that at the time of the epoch the moon had, in addition to the 
complete revolutions, performed 
65157822 
65746575 
of a revolution or, which is 
588753 
the same, that — were wanting to a complete revolution. This 
fraction, in order to be capable of being introduced into the general 
rule must be turned into 24,589,506^^®; which being done we obtain 
220197 
To this quantity again we have to add half the amount of 
24589506 
the moon’s daily mean motion 
450000 
24589506 
in order to find the mean 
place of the moon at noon instead of the following midnight. The addi¬ 
tion of the two subtractive quantities gives — 670,197, which quantity 
differs by 20 only from the kshepa stated in Yaraha Mihira’s rule : the 
discrepancy to whatever reasons it may be owing is much too small to 
be taken into account; the difference in the mean place of the moon at 
the time of the epoch which results from it amounts to 1" 3'" only. 
The rule following next on the one referring to the mean motion of 
the moon teaches how to find the mean place of the moon’s uchcha. A 
few unimportant emendations being made, it runs as follows : 
“ Add 2,260,356 to (the ahargana) multiplied by 900 and divide by 
2,908,789 ; the result is the mean place of the uchcha of the moon.” 
From the general rule involved in the above viz. that 900 revolu¬ 
tions of the moon’s uchcha take 23lace in 2,908,789 days, it follows that one 
revolution occupies 3,231^^ 23’^ 42' 16-76". Comparing this period with 
the duration of the revolution according to the known Siirya Siddhanta 
which amounts to 3,232^ 2^ 14 53'4” we feel at once inclined to suspect 
that the difference of the two quantities which is rather considerable is 
not merely owing to Yaraha Mihira’s desire of establishing a rule offering 
facilities for practical calculations but results from a real discrepancy of 
the two Siirya Siddhantas. And a closer consideration of the point con¬ 
firms this suspicion. According to the known Siirya Siddhanta the 
cliandrochcha of the moon performs 488,203 resolutions in one mahayuga 
If we now, in order to ascertain the corresponding number of the 
