1911 Encyclopædia Britannica/Lever

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LEVER (through O. Fr. leveour, levere, mod. levier, from Lat. levare, to lift, raise), a mechanical device for raising bodies; the “simple” lever consists of a rigid bar free to move about a fixed point, termed the fulcrum; one point of the rod is connected to the piece to be moved, and power is applied at another point (see Mechanics).