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2On the back faces of the pieces of timber, where they diverge, are fixed socket-pieces (chelonia), for the gudgeons of the axles to work, so that they may revolve freely. The axles at the ends near the gudgeons, are pierced with two holes, so adjusted as to fit and receive the levers. Iron shears are then made fast to the under part of the lower block, whose teeth are received in holes cut in the piece of stone, for the purpose. The loose end of the rope being now attached to the axle, and that turned round by means of the levers, the rope, in winding round the axle, raises the weight to its height and place in the work.
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