EVER

n. Le2v(lev)'u5r. From levare, to uplift. Fr., levier. Ger., Hebel. An elementary mechanical contrivance for aiding an applied power in sustaining or overcoming a resistance. It consists of a movable arm turning on a fixed axis, called a fulcrum. L's are of two cla es. The first includes those having the fulcrum between the power and the resistance; to the second belong those having the fulcrum at one end of the arm. Mechanical advantage is obtained by making the arm of the power longer than the arm of the resistance. The compound I. consists of a succe ion of Ts so arranged that the resistance encountered by one is made to act as a power to the one following, [a, 49.] Davy's 1. A wooden bar to be pa ed into the rectum for the purpose of pre ing upon the aorta and preventing haemorrhage. [E.] L.-wood. The Ostrya virginica and Carp in us a men can a. [B, 121, 185, 275 (a, 35).] [s. 615]