सिद्धान्तशिरोमणि: गणिताध्याय (भास्कराचार्य - ग्रहगणित, मध्यमाधिकार व स्पष्टाधिकार सटीक)

218 (3) Consider for the Sun first for negative equation of centre. (a) On the east, the negative equation being increased, elevation is effected. (b) On the west, the negative equation of centre being rendered less, elevation is effected. (c) For positive equation of centre, on the east it being lessened, again elevation is effected. (d) For +ve equation of centre on the Western side it being increased again it is elevated. Thus with respect to the Sun, the stipulated correction effects elevation in all the cases which accords with the effect of the modern refraction. Then let us consider the case of the Moon. (e) In the case of negative equation of centre, it being lessened in the East, the effect is depression. (f) And being increased in the west, the effect is depression. (g) In the case of positive equation of centre, it being reduced in the east, elevation is effected. (h) And in the west, it being reduced, elevation is effected. Thus in the case of the Moon, the phenomenon is recorded as depression in the case of negative equation of centre. Out of these two cases again the equation of centre being lessened is truly desirable as the Hindu equation of centre is in excess of the true value. So it need not be interpreted as depression. Regarding the other case, the error might have been due to the fact that a lesser parallax being taken, whose effect is to depress