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I.C.S. reference library : a series of textbooks prepared for the students of the International Correspondence Schools and containing in permanent form the instruction papers examination questions, and keys used in their various courses (1904)

International Correspondence Schools · Scranton : International Textbook Co. · leaf 404

An illustration from I.C.S. reference library : a series of textbooks prepared for the students of the International Correspondence Schools and containing in permanent form the instruction papers examination questions, and keys used in their various courses, 1904, leaf 404 — Fig. 30. ViG. 31. and the magnet will exhibit only a small amount of magnetic attraction. Another common form of electromagnet is known as theiron-clad electromagnet. In its simplest form, Fig. 31, itcontains only one magnetizing coil and one core. The coreis fastened to a disk-shaped iron yoke,…

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