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 .