The Astronomical Observatories of Jai Singh c16.6

Language: English

c16.6

¹ e.g., a pocket dial made by Elias Allen about A.D. 1620; a more elaborate dial invented by John Paul Kraus and engraved by T. G. Gutwein; one by Rugendas of Augsburg, 17th century; one by Laurenz Grassl of Augsburg; etc., etc.

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