SMALL TOOLS AND APPLIANCES. 81 



By this method very large blocks are split with an even 

 face. A small stone is easily split by chipping grooves 

 across it, and then repeatedly striking along upon the 

 groove with the face of the hammer. 



BLOCK FOB SAND-PAPER. 



Sand-paper is put up by the manufacturers in quires 

 of sheets nine by eleven inches in size. As used by many 

 workmen, nearly a fourth of each sheet is wasted by 

 folding and crumpling over improperly shaped blocks. 

 A convenient block, figure 101, which permits the use 



Fig. 101. 



of all the sand-paper, is here described. Make a 

 wedge-shaped piece of hard wood, one and a half inch 

 thick, three inches wide, and five and one-quarter inches 

 long, tapering from the head to a sharp edge. Cut a V-- 

 shaped hollow across the head. Fit a piece three inches 



Fig. 102. 



long, of hard- wood, exactly to this hollow. Insert in the 

 head a wood or porcelain drawer knob seven-eighths of 

 an inch in diameter, fastening it securely by a long screw. 

 Cut a sheet of sand-paper into three equal parts, three 



