44 



ELEMENTARY WOODWORKING 



drawing takes no account of perspective. In Fig. 56 

 a is the perspective representation of a track, while b 

 shows a track by mechanical drawing. 



In a working drawing more than one 

 view is necessary to show the true shape 

 of an object. 



In Fig. 57 is shown the mechanical draw- 

 ing of a cylinder, the front view, as its 

 name implies, being the image it would 

 make in a mirror held before it vertically, 



FIG. 57. Median- . , , . . , , , 



ical Drawingof anc * ^ ne *P view ^ ae image it would make in 

 a Cylinder a mirror held directly over it horizontally. 



Top 



S"- 



Front 



Side 



FIG. 68. Mechanical Drawing of End Lap Joint 



Occasionally three views are necessary. Fig. 58 a 

 shows the front, top, and side views of an end lap joint. 



