154                        ALBERUNPS INDIA.

matter.    He who studies them properly will find that
they agree with each other."

Up to the present time I have not been able to pro¬
cure any of these books save those of Pulisa and of
Brahmagupta. I have commenced translating them,
but have not yet finished my work.    Meanwhile I shall

Page 74.       give here a table of contents of the Brahmasiddhdnta,
which in any case will be useful and instructive.

Contents of      Contcnts of the twenty-four chapters of the Brahma-

the Brahma-      ■ i n  a    ,

siddhanta.    siddhauta---

1.   On the nature of the globe and the figure of heaven
and earth,

2.   On the revolutions of the planets; onthe calcula¬
tion of time, i.e. how to find the time for different longi¬
tudes and latitudes ; how to find the mean places of the
planets ; how to find the sine of an arc.

3.   On the correction of the places of the planets.

4.   On three problems: how to find the shadow, the
bygone portion of the day and the ascendens, and how
to derive one from the other.

5.   On the planets becoming visible when they leave
the rays of the sun, and their becoming invisible when
entering them.

6.   On the first appearance of the moon, and about
her two cusps.

7.   On the lunar eclipse.

8.   On the solar eclipse.

9.   On the shadow of the moon,

10.   On the meeting and conjunction of the planets.

11.   On the latitudes of the planets.

12.  A critical investigation for the purpose of dis¬
tinguishing between correct and corrupt passages in the
texts of astronomical treatises and handbooks.

13.   On arithmetic; on plane measure and cognate
subjects.

14.   Scientific calculation of the mean places of the
planets.