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Scientific American, Vol. 57, No. 16 (October 1887) (1887)

leaf 8

An illustration from Scientific American, Vol. 57, No. 16 (October 1887), 1887, leaf 8
thers, from whom the stellar photography under an appropriation from the sensitive plate. However long exposed the plate was, Bache fund of the National Academy of Sciences, plate shown was procured. The spectrum test is illus- assuming all to be in accurate adjustment, the spectra awarded in 1885.… … duces a spectrum with vertical axis and horizontal lines. ENLARGING APPARATUS. This falls upon the photographic objective, and is ©1887 SCIENTIFIC AMERICAN, INC.

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