Davis's Manual of Magnetism: Including Also Electro-magnetism, Magneto-electricity, and Thermo-electricity. With a Description of the Electrotype Process. For the Use of Students and Literary Institutions. With 100 Original Illustrations

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Daniel Davis, jr., magnetical instrument maker, No. 11 Cornhill., 1842 - Electromagnetism - 217 pages
"The book contains a full description of the electrotype process, critical to many subsequent photomechanical patents and methods...The electrotype process was important in photomechanical printing in that it was first used to copy daguerreotypes and was also used in experiments as a printing surface. Eventually Paul Pretsch used it with his photo-galvano-graphic process, and it was used continuously thereafter as a device to duplicate surfaces for printing in practically all the relief processes and some intaglio."--Hanson Collection catalog, p. 8.
 

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