Bui. 76, Bureau of Entomology, U. S. Dopt. of Agriculture. 
Plate V. 
Fig. 1.— Raising 33-Foot Derricks to an Upright Position. (Original.j 
Fig. 2. — Derricks in Position One on Each Side of Tree) Supported by Guy 
Ropes; Pulleys Hooked to Catch-Rings in the Tent. (.Original.' 
