[Pramāṇa](https://indike.org/pramana/) › [Studies](https://indike.org/pramana/ins) › [Science, technology and education](https://indike.org/pramana/ins.science) › [The Astronomical Observatories of Jai Singh](https://indike.org/pramana/ins.science.kaye-1918) › c10.48 # The Astronomical Observatories of Jai Singh c10.48 The Astronomical Observatories of Jai Singh c10.48 - **Language:** English ### [c10.48](https://indike.org/pramana/ins.science.kaye-1918.c10.48) Let \*AB\* (figure 36) be the edge of the Delhi gnomon, and \*ABD\* in the plane of the Delhi meridian. Let \*ABE\* make an angle δ with \*ABD\*, then \*ABE\* represents a meridian at a place whose longitude difference from Delhi is δ. Let \*CX\* denote the direction of the sun when it is in the Delhi meridian, then the arc \*DP\* will measure its declination; and if \*CX₂\* be the direction of the sun when in the plane \*ABE\*, then \*EQ\* will measure its declination. On the Niyat Yantra the semicircle \*ABD\* is not marked, but \*ABE\* corresponds to one of the masonry semicircles, each of which is graduated north and south from E for the purpose of observing declinations. - [Previous: c10.47](https://indike.org/pramana/ins.science.kaye-1918.c10.47) - [Next: c10.49](https://indike.org/pramana/ins.science.kaye-1918.c10.49) - [Up: c10](https://indike.org/pramana/ins.science.kaye-1918.c10) --- Source: [https://indike.org/pramana/ins.science.kaye-1918.c10.48](https://indike.org/pramana/ins.science.kaye-1918.c10.48) · Pramāṇa