The Astronomical Observatories of Jai Singh c10.45

c10.45

The semicircles may be said to correspond to meridians at places whose longitudes differ from Delhi by these angles, and tradition names Greenwich observatory² and the observatory³ at Zurich, “Notkey a village in Japan where there is an observatory, latitude 43° 33′ N. and Longitude 145° 17″ E. of Greenwich,” and “Serichew a town in the Pic Island in the Pacific Ocean east of Russia latitude 48° 6′ and longitude 153° 12′ E.”