Publisher's Synopsis
Excerpt from The Physical Papers of Henry Augustus Rowland
For permission to reprint some of the most valuable papers, thanks are due to various publishers. The committee wish especially to express their appreciation of the kindness of Messrs. A. And C. Black, and of The Times (london) for permission to reprint from the Encyclopaedia Britannica the articles on The Screw and on Diffraction Gratings, and of the Engineering Magazine Company, of New York, for permis sion to reprint the article on Modern Theories as to Electricity.
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