निमिषादिवत्सरान्तः कालो राशिप्रमाणमेकैकः। गणितस्कन्धे प्रोक्तं पूर्वं ग्रहलक्षणैः सार्धम्॥२॥
Time beginning with a second (time taken for a wink) and ending with a year and the measure of each sign of the zodiac have been already treated of along with the characteristics of planets in the section on astronomical calculations.