Grace's Guide

British Industrial History

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 142,881 pages of information and 228,796 images on early companies, their products and the people who designed and built them.

Alvan Clark

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Inventor of telescope, such as the 26 in equatorial at the Naval Observatory, Washington, DC, used to observe Encke's Comet in 1875. [1]


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Sources of Information

  1. The Engineer 1875/03/12