Cork Plugs Save Wear on Drafting Board
Draftsmen, whose work demands the use of drawing paper of uniform size, sometimes experience difficulty in fixing thumb tacks solidly in the board. This is caused by the continual placing of tacks in the same spot and may be overcome by the use of cork plugs which can be removed when worn. At the four points where the tacks are generally placed, bore 1-in. holes nearly through the board. Insert corks large enough to be forced into the holes and trim them off flush with the surface. Tacks will hold firmly in them and new corks may be inserted as needed. —G. F. Thompson, Pittsburgh, Pa.