FUMIGATION OF CITEUS TREES. 
29 
THE MORRILL METHOD. 
In figure 7 is shown an outline of a regulation fumigating tent 
marked after the Morrill system. Three parallel lines and one line 
at right angles to them are indicated on the tent. The middle one 
of the three parallel lines passes through the central point in the tent 
canvas, running lengthwise of the central section or strip of which 
the tent is made and passing over the top of the tent from the edge 
// 
2/ 
S/ 
*/ 
€/ 
?/ 
// 
0/ 
6 
8 
Z- 
9 
S 
1 11111 1 111111 
// 
9/ 
9/ 
*/ 
£/ 
e/ 
// 
0/ 
6 
8 
I 
9 
S 
It 
9/ 
S/ 
PI 
e/ 
zt 
// 
0/ 
6 
8 
£. 
9 
s 
^ycts^^^^t^^ 
Fig. 7.— Outline of a sheet fumigation tent marked according to the Morrill method. (Author's illustration.) 
on one side to the edge on the opposite side; these lines also run in 
the direction in which the tent should be pulled on or off a tree. 
Beginning at the center these lines are graduated in feet toward 
either edge of the tent, after the manner shown in the diagram. 
For tents above 36 feet (average size) it is unnecessary to commence 
the graduation nearer than 5 feet from the center of the canvas. 
When one of these lines is over the middle of the tree the distance 
over can be calculated by merely adding together the two numbers 
on the opposite sides of the tent where the edge touches the ground. 
