42 FUMIGATION METHODS 
trail boards. It was, however, discovered that for 
rather small-sized tents the hoop afforded a better 
means of handling than did the derrick. 
The hoop tents now in use range from eight to 
fourteen feet in diameter. "They are made in the same 
way as a bell tent, omitting, however, the arrange- 
ments for suspending them, and possessing, instead, a 
series of cloth loops for attaching the hoop, as is shown 
in the engraving. 
The hoop is usually made of three-quarter-inch gas- 
pipe; half-inch pipe will do for the smaller sizes, but it 
is too weak for hoops above ten feet in diameter, as it 
bends too easily and soon becomes very crooked. ‘To 
make the hoop, pipeis coupled together until the proper 
length is reached, according to the size desired, and 
then bent into shape. ‘The union is then made by in- 
serting into the ends a piece of iron rod a foot or less 
in length and just small enough to enter the pipe. 
Holes are now drilled through the pipe and rod, and 
rivets are inserted, thus making the joint fast. A 
coupling with right and left hand threads might be 
used instead of the rod and rivets. 
The manipulation of a hoop tent varies according 
to its size. When the diameter of a tent is not much 
greater than the distance between the nearest branches 
of adjacent trees, the procedure is that illustrated in 
Figs. 14-16. 
‘To move such a tent from one tree to the next, two 
men place themselves on opposite sides of it, grasp the 
hoop, and raise the side which is opposite the tree to 
which they intend to move it; they step sidewise, 
dragging the side that is on the ground closer to the 
