Fig. 121.—Tacks in roller
Fig. 122.—Spool on strip of wood for crank.
Fit an empty spool on one end of a piece of wood, one inch wide, three inches long and not less than one-fourth of an inch thick. Slide a large-headed screw in the hole of the spool until the screw rests on the block of wood; then screw it down tight, fastening the spool securely on the wood ([Fig. 122]); screw a second spool on another piece of wood of the same size as the first ([Fig. 123], D and E). Fit the free end of the block of wood over the top of the roller and mark off the space on the block occupied by the end of the roller; with a gimlet bore a hole through the centre of this space, and also in the centre of the top of the roller; place the block of wood over the top of the roller, bringing one hole on top of the other, and fasten the roller and block together with a screw. In like manner screw the other block to the top of the second roller; these blocks and spools form the crank-handles for turning the rollers ([Fig. 124]).
Fig. 123.—Top of box and the crank ready to be fastened on box.
Unscrew the blocks from the rollers and carefully remove the staple-tacks, in order that