जन्तर-मन्तराव थानाय जोनथोरखौ द्राधिया हांखो आरो अक्ष हांखोनि थि थाथायखौ थि खालामनो बाहायदोंमोन।
The astronomical instruments at the Jantar Mantar were meant to determine the exact position of longitudes, the equator and the latitudes.