280 G. Tliibaiit— Vardha Mihira's Panchasiddhdntikd. [No. 2, 
the place of the planet at the epoch of the Karana. It is too consider¬ 
able for being considered as a yearly bija ; a bija of the latter kind for 
Jupiter has moreover been stated in the preceding verse already. 
Having gathered all the information which the Panchasiddhantika 
supplies regarding the mean motions of the planets according to the 
Siirya Siddhanta we now turn to the Homaka Siddhanta. 
The information regarding the ynga adopted by the Romaka Sid¬ 
dhanta is contained in the 15th verse of the first adhyaya :, 
sfVfTTOT: i| 
‘‘ The Innisolar ynga of the Romaka (Siddhanta) comprises 2,850 
years ; (in these) there are 1,050 adhimasas and 16,547 omitted lunar 
days.” 
The first point to be noted with regard to this passage is that the 
ynga is called “ arkendvoh,” a Innisolar ynga, from which it might 
appear that the ynga of the Romaka Siddhanta comprised an integral 
number of revolutions of the sun and the moon only, while the yngas of 
the other Siddhantas as for instance the Siirya Siddhanta are founded on 
the revolutions of the other planets also. If this was really the case cannot 
as yet be settled with certainty. The Panchasiddhantika indeed extracts 
from the Romaka Siddhanta information about the motions of the sun 
and moon merely ; but on the other hand a passage in the Brahmagupta 
Sphuta Siddhanta which will be quoted later on ^hows that STishena 
treated also of the other planets. That he, however, in the construction 
of his astronomical periods considerably diverged from the other Sid¬ 
dhantas we are told by Brahmagupta himself in a passage occurring in 
the first chapter of his Sphuta Siddhanta : 
“ Because the yugas, manvantaras and kalpas which are stated in 
the Smritis as defining time are not employed in the Romaka (Siddhanta), 
therefore the Romaka stands outside Smriti.” 
If we now inquire more closely into the nature of the period made 
use of in the Romaka Siddhanta, we observe at once that the number 
of the solar years as well as that of the intercalary months can be 
reduced by 150 so that we may say as well that 19 solar years contain 7 
intercalary months or that 19 solar years contain 235 synodical months. 
In other words the ynga of the Romaka Siddhanta is founded on the 
well-known Metonic period. Hor is it a matter of great difficulty to 
^ A. 
