This section is from the book "Box Furniture", by Louise Brigham. Also available from Amazon: Box Furniture.

Body. 2 Condensed-milk Boxes (about 7 1/4 in. deep, 13 in. wide, 19 3/4 in. long).
Facing Strips. 3 Strips 3/8 in. thick, 1 1/2 in. wide, and length equal to the inside width of the box.
Make two Small Wall Racks as described for Illustration No. 21. Stand one rack on its end and place the other rack upon it endwise, with both compartments facing the same way. Match their edges and nail them together.
Nail the facing strips on the vertical edge faces, allowing the middle one to project evenly on each side, and having the outside edge of the end ones even with the end of the rack.
 
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