Bui. 76, Bureau of Entomology, U, S, Dept. of Agriculture. 



Plate V. 



Fig. 1.— Raising 33-Foot Derricks to an Upright Position. (Original.) 



Fig. 2.— Derricks in Position iOne on Each Side of Tree) Supported by Guy 

 Ropes; Pulleys Hooked to Catch-Rings in the Tent. (Original.) 



