1910–1911
Britannica 11th
Encyclopaedia Britannica · 11th edition
17,200 18,600 18,420 18,030 17,600 •See S. P. Thompson, The Electromagnet (London, 1891); J. A. Fleming, A Handbook for the Electrical Laboratory and Testing Room, vol. 2 (London, 1903); J. A. Ewing, Magnetic Induction in Iron and other Metals (London, 1903, 3rd ed.). sample of forged ingot-metal for dynamo magnets. No. IV. is a steel casting for dynamo magnets, unforged, made by Messrs Edgar Allen & Company by a special pneumatic process under the patents of Mr A. Tropenas. No. V. is also an unforged steel casting…
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- OCR text aligned to scanned pages
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- Vol. 9, pp. 228-228