Bui. 90, Part I, Buieau of Entomology, U. S. Dept. of Agriculture. 
Plate III. 
Fig. 1 .—Method of Attaching Tent to Hoisting Pole by a Half Hitch of the 
Rope. The Edge of the Tent is Double-lapped. (Original.) Fig. 2.— Top of 
Derrick, Showing Method of Attaching Pulley and Guy Rope. Fig. 3.— Base 
of Derrick, Showing Method of Constructing Braces. (From Morrill.) 
