ECONOMIC VALUE OF FUMIGATION 241 
this was for the ordinary greenhouse insect pests. I 
have never fumigated nursery stock or trees that had 
the San José scale with hydrocyanic acid gas and then 
made careful tests to see if all scales were killed, and 
hence I can not speak on that point. Several mills in 
this state have been fumigated with this gas, and with 
success, but it is difficult to get the mills aired out 
properly without danger, unless special arrangements 
be made to do this from the outside. This state has 
no fumigation laws, and probably will not for some 
time. We have only just succeeded in getting a law 
passed requiring stock entering the state to bear certi- 
ficate of inspection.—Prof. J. M. STEADMAN, Univer- 
sity of Missoure. 
Nebraska fumigates doubtful stock.—Although we 
have done comparatively little in the way of using 
hydrocyanic acid gas for the purpose of fumigating 
nursery stock, a little has been done in this direction, 
chiefly by our nurserymen when they receive stock 
from abroad about which they feel a little dubious.— 
Prof. LAWRENCE BRUNER, University of Nebraska. 
North Carolina.—I think that it is only a question 
of a very short time before fumigation will be one of 
the regular operations of the nurseryman. Where 
there are great interests at stake, I do not think that 
laws compelling fumigation are out of place but 
rather a necessity. Most people are too much inclined 
to look upon fumigation requirements only with 
reference to San José scale. It seems to me that it is 
equally fatal to other insects, and it cannot fail to be 
of very great benefit to the fruit grower. The cost of 
