Page:A Short History of Aryan Medical Science.djvu/22

14 observations. Cassini, Bailly, and Playfair have stated that observations taken by Hindoo Astronomers upwards of 3000 years before Christ are still extant, and prove a considerable degree of progress already made at that period. The ancient Hindoos fixed the Calendar, observed and predicted the eclipses, and were acquainted with the phases of the moon and the motions of the several planets. According to Mr Cole-brooke, they were more correct than Ptolemy in their notions regarding the precession of the equinoxes.

In Mathematics (Ganita) the Hindoos had attained a high degree of proficiency. They invented the decimal system, the differential, integral and infinitesimal calculi. The world owes to them the invention of numerical symbols. They also discovered Geometry (Bhoomiti) and Trigonometry (Triconamiti), in both which sciences they made great advances. Most of the credit given to Pythagoras for the discovery of mathematical truths properly belongs to the ancient Hindoos.

Their knowledge of Chemistry was not meagre. They were familiar with the preparation of sulphuric, nitric, and muriatic acids ; the oxides of