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Scientific American, Vol. 61, No. 18 (1889) (1889)
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ark upon the paper. this article are shown the interior of the instrument accounts for the four cardinal points. If the wind is The circuits are normally broken at the triple register, intermediate between any two, then two contacts are but, by a switch actuated by the clockwork of the room, with… … 4, 5, and 6. Some of the instruments used. © 1889 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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