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On the Construction of a Silvered Glass Telescope Fifteen and a half inches in aperture, and its use in celestial photography

Henry Draper

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On the Construction of a Silvered Glass Telescope Fifteen and a half inches in aperture, and its use in celestial photography

Henry Draper

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New Edition of Hints on Silver-Glass Reflecting Telescopes Manufactured by Mr. G. Calver, F.R.A.S. with Directions for Silvering, Adjusting, &c.

George Calver

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New Edition of Hints on Silver-Glass Reflecting Telescopes Manufactured by Mr. G. Calver, F.R.A.S. with Directions for Silvering, Adjusting, &c.

George Calver

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