Dodge, Mary Mapes, 1830-1905 · New York : Scribner · leaf 566
ts canbe lifted. A single-magnet, like the one shownin Fig. 18, and C in Fig. ig, is made with apiece of soft-iron rod 6 inches long and halfan inch in diameter, the ends of a large spoolsawed off and worked on the rod, and half ajjound of No. 20 insulated copper wire. Toprotect the outer… … FIG. 19. VARIOUS STYLES OF ELr.CTKO-.MAGNETS. For electric bells, telegraph-sounders, andother electrical e(]ui])nient requiring the horse-shoe or double magnet several kinds can beused, but the simplest is made from two car-riage- or machine-bolls and a yoke of soft iron,as shown at E in Fig. 19.…
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