PATTERN MAKING 



13 



In setting a saw, it is always better to use two or three light 

 blows on a tooth than to try" to do the work with one heavy blow ; 

 and this is especially the case if the saw is hard, as all good and 

 well-tempered saws should be. 



The back saw illustrated in Fig. 18 is used as a berich saw for 

 light or fine work, and for fitting and dovetailing. Saws of this 

 type are made from 8 to 14 inches in length, the 10- and 12-inch 



being convenient sizes for general 

 work. As the metal back holds and 

 stiffens the saw, a thin blade should 

 always be selected; and the methods 

 of filing, jointing and setting are the 



Pig. 18. 



Fig. 17. Fig. 19. 



same as already described for hand saws. At least two back saws 

 will be found necessary, one filed for crosscutting, and the other 

 filed as a rip saw for cutting with the grain of the wood, as in 

 the cutting of tenons and dovetails. 



EXERCISE. 



While for those who have had experience in carpentry the 

 following exercise in the use of the back saw may not be necessary, 

 it is recommended to all beginners who wish to acquire skill in the 

 use of this important tool. 



