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Title: Three plates, size about 5" x 4", original photographs of th [Go to resource]
Description: Three plates, size about 5" x 4", original photographs of the spark spectra of 22 elements, spectra are numbered 1 to 22 (in wood box) License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Source: Science Museum Identifier: 1912-255 Go to resource More Like this...
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