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Scientific American, Vol. 76, No. 15 (1897) (1897)
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Mr. Alvan G. Clark, in 1892, and the whole mass which has to be that for the equatorial mounting to carried at the upper end of the Messrs. Warner & Swasey, of Cleve- telescope tube amounts to nearly a land, O., who made the mountings thousand pounds. The focal length of the object for the great… … © 1897 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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