[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) › c7.40 # The Astronomical Observatories of Jai Singh c7.40 The Astronomical Observatories of Jai Singh c7.40 - **Language:** English ### [c7.40](https://indike.org/pramana/ins.science.kaye-1918.c7.40) (l) Separated from the others by the smaller shadow scales (k) are the names of the European months, with a scale showing the days of each month, etc. The instrument was made in A.D. 1680 and correctly indicates that spring commenced on March 10th. - [Previous: c7.39](https://indike.org/pramana/ins.science.kaye-1918.c7.39) - [Next: c7.41](https://indike.org/pramana/ins.science.kaye-1918.c7.41) - [Up: c7](https://indike.org/pramana/ins.science.kaye-1918.c7) --- Source: [https://indike.org/pramana/ins.science.kaye-1918.c7.40](https://indike.org/pramana/ins.science.kaye-1918.c7.40) · Pramāṇa