The underbody should next be made 1/2" × 8" × 18-1/2".
Measure in 3-1/4" from each corner on the long edge, and with the dividers set at 2-1/4", strike a quarter circle and connect these arcs with straight lines, making the width in the middle 4-1/2". Saw this out with a coping saw and finish smoothly to the line.
Locate and drill the twelve screw holes shown, with a drill the size of a No. 6 screw.
Countersink all holes, except the four holes which hold the supports for the cart handle. These four are not countersunk as 1" No. 6 round-head screws are used at these points.
Attach the end uprights to the underbody with glue and 1" No. 6 flat-head screws, eight in all.
Next make the two axles 7/8" × 1" × 8-1/4" and bore and countersink the three holes, on the narrow edge, at the points indicated. Glue and screw these in place, 1-1/4" from the front and rear ends, using 1-1/4" No. 8 flat-head screws. These axles project 1/8" beyond the sides of the underbody, on all sides, so as to allow the wheels to turn without interference.
The wheels may be made on a lathe or with a turning saw, 7/8" thick and all exactly 4" in diameter. Bore a hole in their center with a drill a little larger than the wire of a 2" No. 10 round-head screw. When assembling, use a washer on each side of the wheel.
Plate 44.