Biodiversity Heritage Library
Browse Our Collection by:
On the construction of a silvered glass telescope, fifteen and a half inches in aperture, and its use in celestial photography,
By: Draper, Henry, - Ritchey, G. W.
Publication info: Washington,Smithsonian Institution,1904.
Contributed by: University of California Libraries (archive.org)
Subjects: Astronomical photography Mirrors Reflecting telescopes