Frontispiece illustration contains three figures. Figure six is entitled "Spectrum showing the absorptive power of Sodium vapor," which is a spectrum of sodium. Replicating Sir Isaac Newton's (1642-1727) discovery, figure five is entitled "Solar Spectrum" and shows a ray of light passing through a prism, which projects a spectrum onto a surface. Figure seven is entitled "Actions of a prism on a ray of light" and shows light passing through successive prisms with a screen containing an aperture to refract the violet ray. Further explanation can be found on pages 89-91.
This frontispiece illustration comes from The Phenomena and Laws of Heat by Achille Cazin. Frontismatter and select illustrations have been digitized from this work on the laws of heat.
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|Rights||Public Domain Mark 1.0|
Cazin, Achille. “Spectrum of Sodium / Solar Spectrum / Action of Prism on Simple Rays.” The Phenomena and Laws of Heat. New York, New York: Scribner & Co., 1869. https://digital.sciencehistory.org/works/4rdef8i.
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