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 [1787]

Edwards, John, Rev., B.A

Published by Recreasoft, Paris, 2026

About this Item

Language: English. Approximately 60 pages. English: Print-on-demand reprint. Original edition : 1787. Text in English. This rare 18th-century treatise by John Edwards provides detailed instructions for crafting high-quality mirrors for reflecting telescopes. It covers the composition of metals, casting techniques, and the precise methods of grinding, polishing, and achieving the parabolic figure essential for optical accuracy. The work is a valuable resource for historians of astronomy and instrument makers. Book images are non-contractual.

Seller Inventory # LRB36009303

Bibliographic Details

• Title: 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 [1787]
• Publisher: Recreasoft, Paris
• Publication Date: 2026
• Binding: Softcover
• Edition: Reprint.
• Condition: New