(London :  Kegan Paul, Trench, Trübner & Co.,  1910.)

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 ``` CHAPTER XXXV. 349 For the purpose of finding these times they use the following calculation :— Multiply the elapsed lunar days of the month, if they are less than 15, or, in case they are more, the difference between them and 15, by the number of the ghatis of the night in question. Add 2 to the product, and divide the sum by 15. Then the quotient repre¬ sents the number of ghatis and minor fractions of time between the first night, and either the setting of the moon in the night in question, one of the nights of the white half, or the rising of the moon in the night in question, one of the nights of the black half. This calculation is based on the fact that the space of time between the first night and the rising or setting of the moon in some following night of the same luna¬ tion varies by two minutes (ghati), and that the nights vary, lasting either a little longer or a little shorter than thirty minutes. If, therefore, you count thirty minutes for each nychthemeron, and you divide the product by half the number of the minutes, you get two minutes for each nychthemeron. As these two minutes, however, agree with the difference of the nights, they multiplied the number of nychthemera by the measure of the night, i.e. the number of its ghatis (see above, 11. 6, 7), whilst it would have been more accurate to multiply b}^ the half of the sum of the ghatis of the night in question and of the first night of the lunation. It is useless to add the two minutes, Page 177. for they represent the moment when the crescent of the moon first becomes visible, but if this moment were adopted as the beginning of the month, the two minutes would be transferred to the conjunction. As months are composed of days, there are as many various kinds of months as there are kinds of days. Each month.s. month has thirty days. We shall here use the civil day (Sdvana, v, chap, xxxiii.) as a standard. In agreement with the Hindu calculation of the re- ```