Show I A COMPOUND PULLEY JI i I I Three cents for n half dozen screw hooks Is all the money you need for a compound pulley and any boy or girl can make one Two large spools aAJia 0 1 cat 0 > < s 0 U two small spools four sovonTno > ° r strips of wood SON on Inches long one Inch or a lit tie less wide and half an inch thick four sump blocks of wood and a heavv cord aro the nescssary materials Cut or saw each spool quite near tho shoulder as shown by tho dotted j the tw ° lines Put a pin through ends of each spool letting the ends project for an axle This rIves you careful to a very neat wheel De make tho four wheels of equal thickness thick-ness The four blocks should be each a as wheels trifle thicker than tho about al and > broad as tho sldo strips are 10 holes ono inch long Make two each sldo strip two and a half wcbr of the size from tho ends and the axles is Now ready to Join the ParTake you are and large Take two sldo strips one axles In the one small spool place tho at each holes put a block In position 01 firmly by means end and fasten it A screw book < glue or screws or nails In each end completes ono part the exact Maim tho other part In cord a5 samo way and put In tho shown In tho drawing ono block To uso tho pulley fasten blgb or some other L to tho ceiling tbe block 0 M tho lower Place Attach seem wish to raiseIt will object you can welgbt surprising how m heavy a wclg ho lifted with but little strength six or even Afterward a pulley with six of their be nado eight wheels may working compare |