Directions for Making the Best Composition for the Metals of Reflecting Telescopes; and ... grinding ... true parabolic figure
No Image
- Disbound.
- [London]: Nautical Almanac, [1787]
[London]: Nautical Almanac, [1787]. First Edition.. Disbound.. Good; somewhat dusty & spotted.. 8vo, 60, [4 - adverts] pp. There are occasional small text figures.
Edwards' pamphlet was issued only as a supplement to the Nautical Almanac of 1787. It is a rare 18th century attempt to come to grips with the problem of casting metal specula for telescopes. Edwards also manufactured several telescopes that are known from the testimony of Maskelyne. See King, pp. 89-90.
Edwards' pamphlet was issued only as a supplement to the Nautical Almanac of 1787. It is a rare 18th century attempt to come to grips with the problem of casting metal specula for telescopes. Edwards also manufactured several telescopes that are known from the testimony of Maskelyne. See King, pp. 89-90.
Details
Title
Directions for Making the Best Composition for the Metals of Reflecting Telescopes; and ... grinding ... true parabolic figure
Author
Edwards, J
Binding
Disbound.
Condition
Good
Publisher
Nautical Almanac: [London]
Date
[1787]
Edition
First Edition.