MEASURING I R] ES. 
83 
Deeded, another one is painted on each side of this line ai a 
distance of about :>() inches For tents 60 feel or less in diameter 
and from 12 to 48 inches for tents of larger size. These two lines 
should not be more than l inch is width, so thai they can be 
readily distinguished from the wider median line. The cx-,\c\ cen- 
ter o\' the tent is now located by measurement on the median line 
and the corresponding points on the two outside lines are marked. 
Taking into consideration the smallest tree that the tent probably 
will ever be used to cover, distances are measured on these three 
lines, in both directions from the center, so that parallel lines about 
I indies long, \ inch wide, and 1 foot apart can he made across 
each longitudinal line, beginning 1 fool from the edge of the tent 
FlG. 7. — Tent marked to aid in estimating dosage, in position for fumigation. (Adapted from 
Marian., 
and making the lines in succession toward the center. After making 
a given number of these cross lines on each longitudinal line, the 
number in each case equal to the distance from the middle point to 
the cross line is painted on with conspicuous figures. (PL III, figs. 
3, 4, 5, and 6; PI. IV, fig. 1; PI. VII, figs. 1 and 2.) If properly 
marked according to these directions, the corresponding cross lines 
on the three parallel longitudinal lines should be marked with the 
same number, as shown in figure 6. When the tent is exactly cen- 
tered over a tree the reading at the ground on both sides of the tent 
will be the same. Ordinarily, however, when the tent is so placed 
that this line passes as nearly over the center of the tree as it is 
