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Scientific American, Vol. 62, No. 8 (1890) (1890)
leaf 3
s out through the key hole slot spur-wheel, by means of a sleeve or post loosely fitting each plate are bent under to increase their strength. in the outer post of the chair, when, by means of a in the central opening of the axle. This post extends From its peculiar form of lock this cover can be… … © 1890 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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