44 ELEMENTARY WOODWORKING 
drawing takes no account of perspective. In Fig. 56 
a is the perspective representation of a track, while 6 
shows a track by mechanical drawing. 
In a working drawing more than one 
C ) 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, 
Fie. 57. Mechan- : . . 3 
ical Drawingot 20d the top view the image it would make in 
aCylinder = a mirror held directly over it horizontally. 
chee aan ager 
a ee 
- ' F ! 
Front | “he 
| ee 
a Side b 
a ee > 
: { 
ee ee 
Fic. 58. 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. 
