OO 
other products become infested. He had recently performed one of 
the largest experiments ever undertaken in the use of hydrocyanic- 
acid gas, in a five-story brick mill in Canada. Over 150 pounds of 
potassium cyanide was discharged in the mill, and the results were 
very gratifying. It practically eliminated the flour moth from the 
mill. 
Mr. Fletcher said he did not think enough care could be taken in 
giving instructions when recommending hydrocyanic-acid gas for gen- 
eral use, especially in this stage of introducing it, as a fatal case or 
two would put an end to its use entirely. Several striking instances 
had lately been mentioned which show the intensely poisonous nature 
of this gas. Much more care, instead of less, than has been exercised 
in the past is necessary. With regard to the use of bisulphide of car- 
bon, he certainly was not satisfied with its use in mills, and had not 
got the results promised for it. He was very sorry Mr. Marlatt was 
not present at the meeting, as his laisser-faire policy had given him a 
lot of trouble with the people he had to deal with, and he was of the 
opinion that some others of the Association might have liked to discuss 
that matter somewhat. 
Mr. Sanderson suggested the use, in cases where only a small amount 
of the gas is required, of gelatine capsules, which require about one 
minute to be eaten through by the acid, thus giving time to get the 
box closed. 
Mr. Webster stated that his fumigating houses in Ohio are covered 
carefully and made perfectly air-tight by the use of layers of building 
paper, but if the ordinary nurseryman makes his own fumigating 
house he would not make it any more air-tight than a hencoop. He 
had tried almost every way of introducing the cyanide, but the man 
who did the work invariably complained of severe headache, until he 
devised a method of combining the mixtures under the floors. 
Mr. Lounsbury suggested that a simple way was to have a small 
lead tube leading from the outside of the house, the vessel containing 
the cyanide being placed under the tube, the door closed and locked, 
and the water and acid freshly mixed being poured in through the 
little funnel or tube and the aperture closed. 
The next paper was entitled: 
OBSERVATIONS ON DIABROTICA 12-PUNCTATA OLIV. 
By A. L. Quaintancr, Experiment, Ga. 
In the Southern States particularly this insect is a corn pest of con- 
siderable importance. Injury to the corn plant is confined almost 
entirely to the work of the larve on the underground portions of the 
plant, as the roots and stem below the soil. Injury results to corn 
