. Bulletin. Science. Figure 22.—Pixii magneto generator with Ampere's commutator, whiich is shown enlarged at the bottom of the figure. From H. W. Dove and L. Moser, Repertorium der Physik, Berlin, 1837, vol. i, pi. 2. by Daniel Davis, of Boston, beginning in the spring of ; Most of the preceding instruments of the 1830"s were essentially laboratory instruments constructed for experimental purposes. One of the earliest commercial applications of magneto generators was made by John S. Woolrich of Birmingham, England, in the following decade. In his patent application of 1841, Wo
. Bulletin. Science. Figure 22.—Pixii magneto generator with Ampere's commutator, whiich is shown enlarged at the bottom of the figure. From H. W. Dove and L. Moser, Repertorium der Physik, Berlin, 1837, vol. i, pi. 2. by Daniel Davis, of Boston, beginning in the spring of ; Most of the preceding instruments of the 1830"s were essentially laboratory instruments constructed for experimental purposes. One of the earliest commercial applications of magneto generators was made by John S. Woolrich of Birmingham, England, in the following decade. In his patent application of 1841, Woolrich described how Saxton generators could be modified for electroplating, and his method seemed feasible enough to be tried by the Elkington 26 Charles Page, "New Magnetic Electrical Machine of Great Power, with Two Parallel Horse-Shoe Magnets, and Two Straight Rotating Armatures, Affording Each, in an Entire Revolution, a Constant Current in the Same Direction," American Journal of Science, 1838, vol. 34, pp. 163-169; Daniel Davis, Manual oj Magnetism, Boston, 1847, ed. 2, pp. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smithsonian Institution; United States. Dept. of the Interior; United States National Museum. Washington, Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off
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