Fig. 1.
Fig. 2.
Fig. 3.
The best joint is the "dovetail." Fig. 1 shows the side with the "dovetail" cut; Fig. 2, the end with the points cut; and Fig. 3 shows the joint finished.
To make the joint: on one of the sides of the box mark off lines with the square 2 feet apart; also mark off lines 23 inches apart, and call these lines A and B, as in Fig. 4. Mark on the line A points every inch and half-inch alternately; on the line B mark off a point seven-eighths of an inch from B, and then points for every six-eighths of an inch.
Fig. 4.