120 FUMIGATION METHODS 
room is the same as if the entire enclosure was filled. 
therefore, the cost would be somewhat increased. 
Small room a necessity.—Whatever may be the 
size of the nursery, a small room, say 4 x 5 x7 feet, is 
a necessity. Very often a small order or a few trees 
to complete a big order are needed quickly. It would 
be poor economy to use eighteen ounces of cyanide, 
costing about forty cents, to fumigate a handful of 
trees in a large room, when one ounce, costing less than 
two and one-half cents, in a small room would answer 
the same purpose. It is not desirable, in most cases, 
to mix up small orders with car-load lots, and in most 
nurseries a small room will be found in almost con- 
stant use. The kind, shape, size, and location of the 
fumigating house rests entirely with the individual, 
and he must be the judge as to what is best suited for 
his purposes. One thing must be remembered at all 
times, whatever may be constructed, and that is, it 
must be gas-proof. 
Preparation of trees.—The house having been con- 
structed, the next step is the proper preparation of the 
trees for treatment. In the first place, care should be 
taken that the trees are thoroughly matured and dor- 
mant before they are dug and passed into the fumi- 
gating house. Nurserymen should heed carefully the 
cautions cited in Chapter III. Well-matured nursery 
stock should be dug in the customary way, tied in 
loose bundles, brought to the fumigatorium, and piled 
loosely, not packed, upon the floor, with the roots 
toward the walls and tops overlapping. ‘The trees 
should be as dry as possible. They may be damp or 
