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The Photographic Process in Spectrum Analysis

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As G. R. Harrison has frequently emphasized, spectrographic analysis is a null method. The spectrographer tries to demand of the photographic material only that equal densities shall represent equal exposures, and his primary concern is with the numerous forms of error which may falsify this result. It is always valuable, however, to know the general characteristics of any process with which one works. One might say the scientific background of the process, but the true scientific background of photography is a long way removed from analytical operations, and much of it is only sketched in. There is, however, much systematic knowledge available; to those who are interested in the subject, the best reference book is "Theory of the Photographic Process" by C. E. K. Mees1. The recent pamphlet on "Kodak Materials for Spectrum Analysis"2 summarizes information on practical problems.

Document Type: Research Article

Affiliations: Eastman Kodak Co., Rochester 4, N.Y.

Publication date: August 1, 1946

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