71 
TREATMENT BY FUMIGATION. 
The assistance of Prof. C. W. Woodworth, of the California Experi- 
ment Station, was secured for a month last winter, and his suggestions 
and experience were utilized during this period. Various styles of 
tents—hoop, sheet, and bell—were made ready, from 8-ounce duck or 
6-ounee drilling, the cloth being mildew proofed at the tent factory. 
When upon the ground where they were to be used they were painted 
with linseed oil, into which enough lampblack was stirred to give body 
and color to the preparation. 
Some trouble with burning of cloth was experienced, it being found 
to be almost impossible to paint a large bell tent without serious dam- 
age, necessitating extensive patching, unless the derrick upon which 
it was swung was in perfect working order and repair, so as to avoid 
the risk of leaving a fold in the canvas for even a short time while 
drying out. The weight of oiled tents is also a great objection to them. 
Cactus juice is not available in Florida in sufficient quantity for tent 
treatment and some new application must be found. A preparation 
used by sailors in semitropical waters has come to my attention, and I 
hope it is not without value. My. Arthur Weaver, who superintended 
the fumigation of Mr. A. G. Liles’s grove, used the preparation and 
reported it lighter, tighter, cheaper, and more satisfactory in every 
respect than oil, with which he had had equal experience. It is said 
not to burn cloth and to be mildew proof. Cloth so treated and in use 
upon boats in Gulf waters is said to last five or six years. Such endur- 
ing quality is a very great consideration in our moist climate; and if 
continued experience with the recipe proves it to be as satisfactory as 
reported, I shall feel that one long step forward has been taken. As 
the recipe came to me but recently, I have not yet given it a personal 
test. The formula for this paint, as used by Mr. Weaver, is given in 
the Annual Report of Florida Experiment Station, now in the hands 
of the printer. The remainder of this paper, as well as much of that 
already given, consists in the main of almost verbatim extracts from 
said report. 
For trees not over 12 feet high hoop tents were found to be most 
satisfactory. Above that to 20 feet in height I think sheet tents will 
prove best. Above 20 feet the bell or sheet will be most satisfactory. 
As one result of the work, a new pattern of derrick was devisec for 
swinging large bell tents, which seems more flexible to varying require- 
ments than the California patterns, or perhaps I should designate tents 
handled thus as box tents, for they are swung in pairs with the derrick 
upon the same general principle as the box tent, 7. e., the type of 
box tent deseribed in Bulletin 122 of the California station, a derrick 
being substituted for the lifter. The idea that a bell tent might be 
handled like a box tent was due to Professor Woodworth, who men- 
tioned it upon the day of his departure, and the practical working out 
of the idea was achieved by the writer’s combination of ideas derived 
from various sources. 
