SAWS AND SAWING 



45 



FIG. 44. Proper use of hammer. 



as shown in Fig. 42. A bevel angle should be laid off with a 

 bevel-square, much as a right angle is with a try-square. 



Each end of the brace in the buggy axle rest should be com- 

 pletely denned by making bevel-square lines on edges and 

 try-square lines on broad surfaces (Fig. 43). 



22. Nailing. The nailing exercise is the principal one in 

 the construction of the 

 measuring crate, aside 

 from the use of the try- 

 square and crosscut-saw, 

 as it is assumed that lath 

 or strips dressed to dimen- 

 sions will be used as stock. 



The hammer should be 

 grasped in the right hand 

 near the end of the handle and swung freely from the elbow 

 in a vertical plane with but slight wrist and shoulder 

 movement. The thumb and finger of the left hand should 

 hold the nail (Fig. 44). 



Where a good many operations are re- 

 peated, it is often well to use a form, or jig, to 

 secure uniform results and to avoid waste of 

 time in unnecessary preliminaries in making 

 each individual operation. 



Fig. 45 shows jig which might be used in locating and 

 driving nails when fastening crate strips on corners. The 

 holes are sufficiently large so that when the jig is placed over 

 the end of a crate strip in position to nail, and the nail is 

 driven thru the jig hole, the jig may be lifted off, the head of 

 the nail being smaller than the hole in the jig. 



FIG. 45. Jig for 

 nailing. 



