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Report of comparative tests of roundels from an ophthalmologist's standpoint (1904)

Black, Nelson Miles, author · [Bethlehem, Pa.?] : [publisher not identified] · leaf 8

An illustration from Report of comparative tests of roundels from an ophthalmologist's standpoint, 1904, leaf 8
Diagram showing curves of color value in spectro-photometric test.

Lighting · Color · Railroads

Internet Archive · U.S. National Library of Medicine · Public domain (published before 1931). Free to use for anything.

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