jantar-mantar

[Rajesh Kochhar]

Anand M Sharan  says ,"He [Jaisingh}called his sundial-Jantar Manta".
What is the basis of this statement. Where is it written or implied that the name Jantar Mantar was used by Jaisingh himself.
Rajesh Kochhar
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Prof Rajesh Kochhar
Director
National Institute of Science, Technology and Development Studies
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