ECONOMIC VALUE OF FUMIGATION 243 
Were I to buy trees for personal use I should most cer- 
tainly insist upon their being fumigated, especially if the 
grounds of my neighbor were badly infested with San 
José scale. I believe fumigation is a good thing aside 
from any suspicion of the presence of the San José 
scale, because it enables a man to start his treesas free 
from insect pests as perhaps any process through which 
he could put them.—Dr. E. P. FELT, State Entomolo- 
gist, New York. 
Ohio.—I have not had any reason to change my 
former opinion as to its efficiency. Used at the proper 
season, I do not know that there is the least danger to 
nursery stock, and I do not believe, if properly used; 
it is possible for a scale insect to pass through a fumi- 
gating house alive. We may say, as among other 
things connected with nursery work, and, in fact, every- 
thing else, much depends upon whether fumigating is 
done properly or improperly. All of the houses that I 
have had built have been provided with slat floors and 
we have generated the gas underneath. I find this is 
much more practical than any other way that I have 
tried. Of course for very small nurseries we have 
advocated a tight box, but this is only where plants 
like raspberries and blackberries are fumigated.—Prof. 
F. M. WEBSTER, Lxtomologist Ohio Experiment 
Station. 
Pennsylvania.—I have not made a thorough canvass 
of our state in regard to the use of hydrocyanic acid 
gas, but know that many of our nurseries have con- 
structed fumigating houses and are carefully subjecting 
infested stock to the gas treatment. This treatment is 
