314 BOARD OF AGKICULTURB. 



scale settling down on peach trees where we had used the heavy oil and 

 where we had done a good job of spraying. When we get through the 

 season we will be able to tell you more about that, but at the present 

 time, as to protection against reinfestation, the outlook is not very en- 

 couraging. At the present time I see nothing better than to go on with 

 the use of whale oil soap. I do not think we have got to the point where 

 we can put crude petroleum in the hands of inexperienced men, and until 

 we reach that point I am much in favor of using the whale oil soap, for 

 the reason that there is great danger of doing damage to the trees by the 

 use of crude petroleum and there is not that danger with the use of soap. 

 I believe we will leave that subject now and take up another one. 



Of course, you will be interested in the pumps that are to be used 

 because you have to use them in spraying. . I do not care to be under- 

 stood as advertising anybody's pumps, nor as running down anybody's 

 pumps; but we confronted that problem last spring when we attempted to 

 find out something regarding the use of crude petroleum and how we were 

 going to do it. I got a Kerosine-water pump from the factory. There had 

 been a good deal said about them. Before we did anything I wanted to 

 know what we were working with and what we were doing, so I said to 

 my man, "Go to work and see what you can do with this." 



In order to find out just what we were doing you spray a little while, 

 and if this is running nicely, instead of spraying a tree take two or three 

 dozen fruit cans with you, and by standing these cans up you can spray 

 into those fruit cans, and see what you have been doing. I will read 

 you the results. 



Instead of spraying 5 per cent, of crude petroleum we found we actu- 

 ally sprayed 3 3-10 per cent; instead of spraying 10 per cent, we found 

 we were actually spraying 13%; instead of spraying 15 per cent, we were 

 spraying 85%; instead of spraying 20 per cent, we were spraying 19%; 

 Instead of spraying 25 per cent, we were spraying 11% per cent. This was 

 learned by stopping in the midst of the spraying and spraying into a fruit 

 jar instead of on a tree. 



We did not know but what something might be wrong, and so we 

 cleaned up everything just as clean as if it had just come from the shop, 

 and tried it again. We sprayed again, and then sprayed in the fruit jars, 

 and this is what we got: 



With the indicator set to spray 5 per cent, of crude petroleum we 

 sprayed Qi^j per cent.; instead of spraying 15 per cent, we were spraying 

 28 3-10 per cent; instead of spraying 20 per cent, we were spi'aying 16% 

 per cent; and with the indicator set for spraying 25 per cent, we were 

 spraying 18% per cent. 



I gave it up, as I then decided that we could not tell what we were 

 doing. I then did what Americans do not like to do, sent over to Canada. 

 I was there last fall, and they were telling me a good deal about a spray- 

 ing machine that tjiey were making, to use crude petroleum. I sent pv^ 



