Britannica 11th · 11th edition

P- 337-

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OCR text aligned to scanned pagesVol. 9, pp. 179-1791910–1911

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also examined the efficiency and current producing power of influence machines. BIBLIOGRAPHY.— In addition to S. P. Thompson's valuable IKIJHT on influence machines (to which this article is much indebted) and other references given, sec J. Clerk Maxwell, Treatise on Electricity and Magnetism (2nd ed., Oxford, 1881), vol. i. p. 294; J. D. Everett, Electricity (expansion of part iii. of Dcschanel's Natural Philosophy) (London, 1901), ch. iv. p. 20; A. Winkelmunn, Handbuch der Physik (Breslau, 1905), vol. iv. pp. 50-58 (contains a large number of references to original papers) ; J. Gray, Electrical Influence Machines, their Development and Modern Forms (London, 1903). (J. A. F.)