Directions for making the best composition for the metals of reflecting telescopes: and the method of casting, grinding, polishing, and giving them the true parabolic figure / [John Edwards].

  • Edwards, John, Rev., B.A.
Date:
[1787]
Catalogue details

Licence: Public Domain Mark

Credit: Directions for making the best composition for the metals of reflecting telescopes: and the method of casting, grinding, polishing, and giving them the true parabolic figure / [John Edwards]. Source: Wellcome Collection.

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    DIRECTIONS FOR MAKING THE BEST COMPOSITION FOR The Metals of Refledting Telefcopes; AND THE METHOD * OF CASTING, GRINDING, POLISHING, AND GIVING THEM THE TRUE PARABOLIC FIGURE. B Y The Rev’d JOHN EDWARDS, B. A. Publiflied by ORDER of the COMMISSIONERS OF LONGITUDE. A