The Astronomical Observatories of Jai Singh c8.1

c8.1

21. Hindu astrolabes are mostly of modern workmanship and of modern pattern; but at Jaipur there is a Hindu copy of a Persian astrolabe that is of interest. It is of inferior workmanship, and was, apparently, never properly completed. It is a *thulthī* or tripartite instrument, and has two tablets, for latitudes 27° and 72° N., and a tablet of celestial latitudes and longitudes. On the ‘ankabūt the ecliptic is graduated at intervals of 6 degrees (figure 26), and on most of the points no names are engraved. On the back of the instrument (figure 27) is the usual table of sines, and declination graphs for 27° and 28° 39′. On the lower half are the usual shadow scales but nothing else.