ABC OF THE STEEL SQUARE 119 



by dotted lines ) by laying the square with blade 

 on the line C D (Fig. 82) and tongue, cutting 

 at the center A. Note the length on the tongue 

 of the square. Make a mark of this length on 

 the edge of board. Now take the width of A 

 to D (Fig. 84) which is 6 inches off the blade; 

 keep this 6-inch mark fair at the end of this line- 



Fig. 82, 



made on the board (Fig. 81) and push on square 

 until the tongue touches the end of the line: 

 mark by the tongue, and this gives the bevel 

 required. 



To obtain an example of unequal pitches re- 

 fer to Fig. 84. To set this out, run a line par- 

 allel off the edge of the board, and off this line 

 i-quare another. With the intersection A as a 

 center, describe a semi-circle of 6 inches radius. 



