The Astronomical Observatories of Jai Singh c8.8

c8.8

The only other ordinary astrolabe of Hindu make, and of any age, known to me is R in the list on p. 17. It is engraved in Devanāgarī character and is of very crude workmanship, as compared with A, B, C, D and E. It is of copper of 7 inches diameter, and contains two tablets, besides the ecliptic tablet (‘ankabūt). The venter is plain, while the back has only the central rectangular shadow scales, the *sinus quadrantus* ruled into 30 equal divisions, and the declination quadrant divided into even spaces by 15 arcs. The two tablets are tripartite, and, besides the almucantarats and azimuth lines, have the equal and temporal hour lines. They are inscribed thus:—