 Ramba uchinyora ndima iyi - Jantar Mantar iboka rezviridzwa zvematombo, zvakagadzirirwa kushandiswa neziso rakashama. Pakanga pane Jantar Mantars shanu muIndia, dzose dzacho dzakavakwa pakurayira kwaRajah Jai Singh II, uyo aiva nefariro huru mumasvomhu, kuvaka uye nyeredzi; mana anosara, sezvo Jantar Mantar paMathura yakaparadzwa pamberi chaipo pokupanduka kwa 1857. Muenzaniso mukurusa ndewachi yezuva yeequinoctial yeungano yeJaipur yezviridzwa, inoumbwa nechinhu chikuru chine mativi matatu chine hypotenuse yakaenzana neakisi yePasi. Pamativi ose echinhu chacho pane chikamu chedenderedzwa, chakafanana nepanzvimbo yeEquator. Chishandiso chacho chinogona kushandiswa nokururama kwemasekonzi anenge 2 nemucherechedzi ane unyanzvi kuyera nguva yezuva, uye kuderera kweZuva nemimwe miviri yokudenga. Ndicho chidhori chikuru zvikurusa chedombo chezuva chenyika, chinozivikanwa seVrihat Samrat Yantra. 