STATE POMOLOGICAL SOCIETY. 8l 



chance in such a case. We hke to be sure, even if we have to 

 do it a second time. 



Question : I would hke to- ask if you would not get about 

 the same results in spraying with a low pressure pump, that is, 

 80 lbs., if you had a fine disc, forcing the spray through it, as 

 you would with a 200 lb. pressure with a larger disc. 



Prof. Blair: What we figure on is the amount of surface 

 that we can cover in a given time. We cannot afford to spend 

 that much time. When you have a small disc you will only get 

 so many gallons with the 80 lbs. pressure, in a certain time. We 

 are not satisfied, and want larger discs and more pressure. 



Question : You cut down your capacity ? 



Prof. Blair : Yes, the whole idea of the bigger outlet and 

 the power is to put on instead of 500 gallons in a day, 1200 

 gallons in a day or more and get the work done. Where we 

 have our large orchards we have to figure on that very closely. 



Question : Doesn't it run off the upper part of the leaf, leav- 

 ing it on the tip entirely ? 



Prof. Blair : You will have a heavier coating on the tip, but 

 still you have a coating above, just the same. 



Question : Enough so it shows very plain ? 



Prof. Blair : Well, it will show. It will not show very plain, 

 but so that you can notice a coating there. I do not see that it 

 is necessary that there should be a very thick coating, except 

 that if you have a heavy coating when the leaf is quite young 

 it will be reasonable to suppose that it would give you longer 

 protection, because, as the leaf expands the coating must gradu- 

 ally get thinner, hence the importance, or what we thought was 

 the importance, of using a greater strength for the first sprays 

 in order to give us the necessary protection over a longer period. 



Question : Your figures on the arsenate of lead, were they 

 on the dry or wet arsenate? 



Prof. Blair : The figures that I have given you were for the 

 most part paste arsenate. 



Question : Did you use dry and wet, pound for pound ? 



Prof. Blair: No, no, 5 lbs. paste to 100 gallons, 2 lbs. dry to 

 too gallons. 



Question : That is what I was getting at. I would like to 

 ask how this pump is made that gives you the same result at 80 

 lbs., as the old pump at 200. That is a new thing to me. 



