The Astronomical Observatories of Jai Singh c11.s2.t1.49

c11.s2.t1.49

Lieutenant Garrett's work has been somewhat severely criticised in one respect.² He found that the Rāśi Valaya instruments did not accord altogether with his idea of their use, and altered the angles slightly. He assumed that each instrument corresponded to a 'rising sign,' and was to be used at the time of rising of the particular sign for the measurement of celestial latitude and longitude. The following table shows the actual alterations made in the twelve instruments corresponding to the twelve signs:—