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[en] [Gutenberg 53542] • On the Construction of a Silvered Glass Telescope / Fifteen and a half inches in aperture, and its use in celestial photography
Draper, Henry
[en] [Gutenberg 53494] • New Edition of Hints on Silver-Glass Reflecting Telescopes Manufactured by Mr. G. Calver, F.R.A.S. / with Directions for Silvering, Adjusting, &c.
Calver, George
![[Gutenberg 53542] • On the Construction of a Silvered Glass Telescope / Fifteen and a half inches in aperture, and its use in celestial photography](/cover/rrbcuVcr4dMdon_c/small/[Gutenberg%2053542]%20%e2%80%a2%20On%20the%20Construction%20of%20a%20Silvered%20Glass%20Telescope%20/%20Fifteen%20and%20a%20half%20inches%20in%20aperture,%20and%20its%20use%20in%20celestial%20photography.jpg)
![[Gutenberg 53494] • New Edition of Hints on Silver-Glass Reflecting Telescopes Manufactured by Mr. G. Calver, F.R.A.S. / with Directions for Silvering, Adjusting, &c.](/cover/Y3U4un81gTFP2qSp/small/[Gutenberg%2053494]%20%e2%80%a2%20New%20Edition%20of%20Hints%20on%20Silver-Glass%20Reflecting%20Telescopes%20Manufactured%20by%20Mr.%20G.%20Calver,%20F.R.A.S.%20/%20with%20Directions%20for%20Silvering,%20Adjusting,%20&c..jpg)