8 
BULLETIN 527, U. S. DEPARTMENT OF AGRICULTURE. 
figure 19 is shown the working drawing of the nail box described and 
illustrated in Exercise l,with the front, top, and end views, looked 
at in the directions of A, B, and G, drawn out and shown in heavy 
lines to illustrate how they are obtained. In the working drawing of 
figure 18, these views are shown Laid out flat. Solid lines in working 
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Fig. IS.— Nail box. 
drawings show the front edges of the boards; those that can be seen. 
Dotted lines indicate the edges of boards that can not be seen, be- 
cause of boards in front of them. 
In some of the exercises all three kinds of drawings are shown. In 
others only the perspective drawing is shown, as it in itself will show 
how to make the article. 
