From the December 16 & 23, 1933, issues

STRENGTH OF CRATES TESTED BY TOSSING

An important phase of the work of the timber mechanics department of the U.S. Forest Products Laboratory at Madison, Wis., has been to perfect the designing and nailing of these boxes so that their durability is greater. Chemically treated nails and reinforcement by diagonal braces have given more rigidity to a crate than the use of a high-grade wood could.