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Scientific American, Vol. 63, No. 12 (September 1890) (1890)

leaf 4

An illustration from Scientific American, Vol. 63, No. 12 (September 1890), 1890, leaf 4
es of which each have three rack hands anew at O, by a firm pressure of the fingers. immediate attention. It is. evident that this safety teeth, while the inner ends thereof are centrally Upon one of the shafts is a lug, and on the main back indicator can be used in connection with any form of… … tons, and last year 4,717,730 tons. OLSEN'S LIFTING TRUSS GIRDER. HAYTON'S MECHANICAL MOVEMENT. © 1890 SCIENTIFIC AMERICAN, INC.

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