Surya Siddhanta
तन्नाडिकाहते भुक्ती रवीन्द्वोः षष्टिभाजिते । तत्फलान्वितयोर् भूयः कर्तव्या विवरासवः॥
Multiply the daily motions of the sun and moon by the result, in nadis, and divide by sixty ; add to the longitude of each, the correction for its motion, thus found, and find a new their interval, in respirations.
english translation