Scissors

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“Many instruments in common use are on the principle of this kind of lever. Scissors, consists of two levers, the rivet being the fulcrum for both. The fingers are the power, and the cloth to be cut, the resistance to be overcome.” -Comstock 1850

Galleries

Levers

Source

J. L. Comstock A System of Natural Philosophy: Principles of Mechanics (: Pratt, Woodford, and Company, 1850) 72

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