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Scientific American, Vol. 80, No. 13 (1899) (1899)
leaf 7
APRIL I, 1899. 200 … It may be asked here whether there is any way of hinge fashion with the needle, J, and the plate holder, 1.—Ratio 2:3, 2.—Ratio 8:4. 3.—Ratio 5:7. ht &.—Ratio 3:4. 11.—Ratio 5:7. 15.—Close ratio. © 1899 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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