200 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 4 



President Sanderson: These three papers open up a wide field 

 for discussion. 



Mr. Symons: I would say that I feel some hesitation about dis- 

 cussing this problem beside Mr. Worthley, who has so ably presented 

 the matter of spraying- in the New England States. He gives some 

 good reasons why the price of rubber has gone up. We hear of the 

 miles of hose they have used. There are some points I glean from 

 these papers, with which I do not entirely agree, but on the whole 

 they are very instructive. Referring to the point made in regard 

 to the use of the barrel pump, and a man maintaining two leads of 

 hose, I would say I would not like to be the man to keep the nozzles 

 busy. There is another point, I note that two of the papers do not 

 advise the use of gear sprayers. We have found in our state that in 

 some respects gear sprayers have given considerable satisfaction. 

 It certainly is to be said they are not designed for treating large 

 trees. We previously had a gasoline engine made in accordance with 

 our own ideas, and the men have absolutely abandoned that engine 

 for the Brown gear sprayer. Now, in regard to the sprayers on the 

 market, it seems to me the manufacturers have been slow to take up 

 some points we have made in regard to spraying machinery. I 

 know at least one firm which continues to make pumps with large 

 air chambers above the barrel, which I believe we all concede is 

 rather impractical. Moreover, the power sprayer is the coming 

 sprayer, and of that kind I would say the Friend seems to be pre- 

 dominant. But, even with that outfit, I believe that they can reduce 

 the weight of the engine. The one we previously used weighed only 

 ninety pounds, and gave satisfaction, while the larger engines, the 

 Goulds and others, weigh from 300 to 400 pounds, and certainly it 

 seems as if they could reduce that weight. I think the suggestion made 

 by Professor Ball in regard to a tower is an excellent one. 



Mr. Headlee: Our time is very short, and I think the ground has 

 been thoroughly covered. I wish to touch briefly on one point — 

 spraying by means of compressed air. In large orchards compressed 

 air appears to be one of the very best sources of power. Mr. George 

 Richardson of Tonganoxie, Kan., has gotten together the necessary 

 machinery and has used compressed air for several years in treating 

 his large orchard. He said to me at Christmas time, "If I did my 

 spraying as most fruit growers do it, I would have to have four or five 

 expert engineers, and that would mean a large expenditure of money. 

 As it is now, I have one capable engineer and a good air compressor, 

 and I keep my three wagons going all the time." He claims to spray 

 8,000 to 10,000 gallons a day. His apparatus, including the plant 

 for making lime-sulphur wash, represents an investment of about 



