BLOCKS

in the marine, imply littl woode chines aowy difpofed among the rigging of 2 fi as to give additional power to the ropes that con the neceflary mechanifm aloft: fuch as extending tracting, or rat a the fails, by hauling in | cords on the deck. It would be difficule to defer figure of a block, as they are of fuch various fhapes, and powers, fingle, double, and even fix ven-fold, fo denominated from the number of { oy contain. ‘he cat-block is for drawing the anchor up cut-head. The fwivel in the ironbound block is to turn i the parts of the purchafe affixed to it, called the may not be twifted round cach other, which greatly diminith its force. The top-block is to hoift up or lower the top and is hooked in a bolt driven in the cap. The clue-garnet blocks ‘are fixed to the cle lower corners of the fails, and are for drawing th to the yard, when the fail is to be contracted or fi [s. 164]