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Scientific American, Vol. 61, No. 7 (August 1889) (1889)

leaf 3

An illustration from Scientific American, Vol. 61, No. 7 (August 1889), 1889, leaf 3
it In Fig. 1 of the illustrations, 1 represents a tooth in position in the drawhead, and in which the parts will having a cavity needing filling ; 2 and 3 show a matrix always be in a position for automatic coupling after fitted to the cavity ; 4 shows a filling fitted to the mat- the cars have… … certain forms of rubber, may be modified in color to want all the back numbers. CHISHOLM'S CAE COUPLING. © 1889 SCIENTIFIC AMERICAN, INC

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