Powell, George May, 1835-1905 Powell's Patent Multiscope
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Gilder Lehrman Collection #: GLC00687.205 Author/Creator: Powell, George May, 1835-1905 Place Written: s.l. Type: Autograph manuscript Date: 1864-1905 Pagination: 5 p. : Height: 23.1 cm, Width: 16.3 cm Order a Copy
He proposes a substitute for the expensive calcium light for viewing images, with an object that uses either sunlight or lamp light using a graphoscope, inserting a stereoscopic lens. Different lenses allow for different uses, including microscope, telescope, etc.
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