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Title: reflection diffraction grating on speculum metal, engraved: [Go to resource]
Description: reflection diffraction grating on speculum metal, engraved: 1879, 29, 520 spaces, 17296 per inch, manufactured by D. C. Chapman, New York, United States with L. M. Rutherfurd's engine, with dark red leather case License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: diffraction grating - reflection Temporal: 1879 Source: Science Museum Creator: Chapman, D. C. Identifier: 1980-923 Go to resource More Like this...
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