WORK ROUTINE, 87 
ing to the size and number of the trees. For medium-sized trees 
requiring tents not larger than ! l feei in diameter, five men can work 
to advantage. This crew can handle 30 tents every forty-five 
minutes and can treat from 350 to 400 trees in a night's work of ten 
hours. For trees requiring Larger tents, which are shifted hy means of 
Uprights, a crew of five or six men is needed to handle about 12 or 1 5 
tents every forty-five minutes, or between LOO and L50 trees in a full 
night's work. This rapidity is attained when the trees are regularly 
set and properly spaced and when the schedules showing the dosage 
for each tree to be fumigated are prepared during the day, or when the 
dose Is based upon the judgment of the fumigator after the tent has 
been placed in position. As has been stated, the plan of work com- 
monly followed in California in treating scale insects, as far as the 
estimation of dosage is concerned, can not he recommended for use 
against the white 1 fly in Florida. The method of estimating the 
dosage herein recommended at the most affects the schemes of routine 
previously followed in fumigating only by adding an extra man to 
the crew. One 1 man can calculate 1 the dosage faster than two men can 
weigh out the chemicals and generate the gas. The extra expense- of an 
additional man is entirely negligible considering the increase in effi- 
cieicy on the one hand and the check on unnecessary waste of the 
chemicals on the other. 
I itds of water should be placed during the day at convenient 
points in the grove, as should also carboys or large jugs containing 
tin .cid. The tents are taken to the end of the rows, unrolled, and 
pla< ,l in position for covering the first trees. The cart with its sup- 
ply <V acid and cyanid is located near the end of the row of tents, and 
even thing is put in readiness to start work by sundown if the wind 
is not m) strong as to interfere. Each man in the crew has definitely 
assigned duties. The men who handle the poles or derricks are com- 
monly mown in California as "tent pullers," or "tent men." These 
men, w th their one or more assistants, proceed to pull each tent in 
success] >n over the first treesof the row. If one tree should be missing, 
the tent is left unused during the first period rather than to break the 
line by moving it at once to the second tree. As each tree is covered, 
each oneof the tent men, a ft er disconnecting his pole or derrick, walks 
halfway tround the tent, pulling in the edges so that it will not 
spread on. to inclose unnecessary space. A tent after being pulled 
in at the bottom is shown in Plate VI. After reaching the end of the 
row the tern men return to the eart or commissary tray and assist in 
generating (he gas. As soon as the first tent is in position the fore- 
man with a antern in hand, except when the light from the moon is 
sufficient, notes the position of the tent with respect to the center of 
the tree, using as guides the lines heretofore described. The reading 
LS made where the selected line touches the ground. 
