Show A COMPOUND PULLEY three cents for a half dozen screw hooks Is all the money you need tor a compound pulley and any boy or girl can make one two large spools two small spools four strips of wood seven inches long one inch or a lit tie less wide and half an inch thick tour small blocks of wood and a heavy cord are the necessary nes essary materials cut or saw each spool quite near the shoulder aa shown by the dotted lines put a pin through the two ends of each spool letting the ends project for an axle this gives you a very neat wheel be careful to make the four wheels of equal thick ness the tour blocks should be each a trifle thicker than the wheels as broad as the side strips are and about one inch long make two holes in each side strip two and a half inches from the ends and the size of the axles biow you are ready to join the parts take two side strips one large and one small spool place the axles in the holes put a block in position at each end and fasten it firmly by means of glue or screws or nails A screw hoob in each end completes one part make the other part in exactly the same way and put in the cord as shown in the drawing to use the pulley fasten one block to the belling or some other high place attach the lower block the object you wish to raise it will seem surprising hoft heavy a weight can be lifted with but little strength afterward a pulley with six or even eight wheels mav be made and their working corn |