Publisher's Synopsis
Excerpt from The Chemistry of Light and Photography
Among the splendid scientific inventions of this century, two are specially prominent - Photography and Spectrum Analysis. Both belong to the province of Optics, and at the same time of Chemistry. While Spectrum Analysis has, down to the present time, remained almost exclusively in the hands of the learned, Photography passed immediately into practical life, spread over almost every branch of human effort and knowledge, and now there is scarcely a single field in the universe of visible phenomena where its productive.
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