ELEVENTH ANNUAL MEETING. 99 



A barrel pump should be used for orchard purposes. The 

 small bucket pumps are excellent for small work, but they 

 are usually not large enough for large trees. 



Fumigation is a method which is coming into vogue among 

 our nurserymen. The trees are placed in an apartment of 

 the house, and the fumigation is carried on by means of a gas 

 made of cyanide of potash, sulphuric acid and water, taking for 

 each I GO cubic feet of space 20 grams, or a little less than one 

 ounce of the cyanide, one and a quarter ounces of strong sul- 

 phuric acid to two ounces of water. Dilute the acid and put 

 this into a stone jar. Of course it is necessary to see that the 

 house is well and tightly closed. Put this generating jar inside 

 the door of the house and drop the cyanide into the jar and 

 move away quickly. The trees should be left in the gas for 

 about half an hour. Then we can open the doors and the house 

 should be well ventilated before anyone enters. The doors and 

 ventilators should be made so that they can be opened from the 

 outside. If this work is carefully done it is the surest way of 

 killing San Jose scale, and is especially adapted for nursery 

 work. Some of the states, as you know, have laws prohibiting 

 the entry of nursery stock which has not been inspected or 

 fumigated. I advise every member of this Society to demand 

 that stock be fumigated when purchasing from any nurseryman. 



Of course in orchard work, where the growing trees are being 

 treated, in order to use this method it is necessary to have a 

 tent to cover each tree. 



Several questions were asked of the professor, after which the 

 very interesting evening session was brought to a close and the 

 Society adjourned to Wednesday at 9.30 a. m. 



The session was marked by a large attendance, including many 

 Hartford people. 



