Ti CALIFORNIA CITRUS CULTURE. 
a 
several years of trial with the drills it is becoming the unanimous 
opinion of fumigators that by far the best all around tent material is 
the eight-ounce army duck. Though somewhat coarse and open it is 
able to hold the gas well and may be used almost twice as long as the 
drills. 
Tents should be ordered a little larger to allow for shrinkage when 
dipped. 
ee sae) 
Fic. 49.—Apparatus for dipping tents in tannin to prevent 
mildew. (After Woglum.) 
Dipping. To prevent moulding and rotting, new tents are usually 
treated in a tannin bath. <A suitable outfit for this work is shown in 
Fig. 49. 
The tank should have a capacity of from two hundred and fifty to 
three hundred gallons. Oakbark extract of tannin is used at the rate 
of one pound to every five gallons of water. Six or eight pounds of 
