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Scientific American, Vol. 65, No. 4 (1891) (1891)
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EYARA AQ AL first in order, with a probable purchase to follow. knife edge which readily enters between the The engravings are one-third the actual size, switch tongues. The switch has a T-handle of hard rubber, by means of which it is turned. A linear measurement. SIDE VIEW OF FIELD MAGNET, PARTLY… … magnet are attached pieces (Continued on page 54.) © 1891 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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