Screw press

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“A screw is a cylinder, generally made of wood or metal, with a spiral ridge (the thread) winding about its circumfrence. The thread works in a nut, withihn which there is a corresponding spiral groove to receive the thread.” -Avery 1895

Galleries

Screws

Source

Elroy M. Avery School Physics (New York: Sheldon and Company, 1895) 147

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2400×2116, 1.6 MiB

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1024×902, 219.7 KiB

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320×282, 35.9 KiB