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Scientific American, Vol. 26, No. 12 (1872) (1872)
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tter for this purpoge in most cases, especially as adapted to the purposes of this test. the models are very far from being complete, and thousands of them are so broken up that it is impossible to tell what particular patents they belong to; and in many instances it At 11:40, signs of separation… … © 1872 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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