. Bulletin. Science. ^ --'- ^^. Figure 77.—a. Brushes and commutator; b, armature connections, and c, output regulator for the Siemens and Halske dynamo of 1876; d, e, views of a Siemens and Halske motor of the same date with a permanent magnet field and drum armature. From R. W. H. P. Higgs and J. R. Brittle, "Some Recent Improvements in Dynamo-Electric Apparatus," Minutes of the Proceedings oj the Institution of Civil Engineers, 1878, vol. 52, pp. 36-98, pi. i. the current form of the arc light and that would all be on the same circuit. This was the problem of the subdivision of th
. Bulletin. Science. ^ --'- ^^. Figure 77.—a. Brushes and commutator; b, armature connections, and c, output regulator for the Siemens and Halske dynamo of 1876; d, e, views of a Siemens and Halske motor of the same date with a permanent magnet field and drum armature. From R. W. H. P. Higgs and J. R. Brittle, "Some Recent Improvements in Dynamo-Electric Apparatus," Minutes of the Proceedings oj the Institution of Civil Engineers, 1878, vol. 52, pp. 36-98, pi. i. the current form of the arc light and that would all be on the same circuit. This was the problem of the subdivision of the electric light. The first significant step towards the solution of this problem was made by a Russian military engineer named Paul Jablochkofr.'"^ He had retired w* "JablochkofT," La Grande Encyclopidie, Paris, , vol. 20, p. 1152; Electrician, London, 1894, vol. 32, pp. 663-664. from the army in order to devote himself to the in- vention of an electrical light and decided to visit the Philadelphia Centennial Exposition of 1876. How- ever, he tarried in Paris in order to visit Breguet's electrical shop, where both Gramme dynamos and Serrin regulators were constructed; and he was so fascinated by what he saw that he never finished his journey. Instead, he found employment at Breguet's ^PER 30: DEVELOPMENT OF ELECTRICAL TECHNOLOGY IN THE 19TH CENTURY: III 393. 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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