TlVENllJiTII ANNUAL MEETING. 75 



in a fine mechanical mixture, not chemical unity. Dilute at 

 once with cold water. That is really not self-boiled lime-sul- 

 phur, ju^'t slaked and then water added to stop the cookini;-. 

 the natural cookini^". So when you have properly made so- 

 called self-boiled (Scott's mixture), it has little or no solu- 

 ble sulphur in it, and therefore cannot Inirn the foliaj^e, 1k- 

 cause it consists of nothing but particles of sulphur and the 

 slaked lime mixed together. When that is si)raycd on the 

 tree there is no soluble sul])hur to cause the burning. 



The home-boiled lime-sulphur is the concentrate as I now 

 speak of it. The home-boiled concentrate is made by boil- 

 ing lime and sulphur together for 45 minutes or an liour. In 

 that case the lime and sulphur have gone together in a chemi- 

 cal union, you don't get them separately, and you have so- 

 called sulphides of sulphur and calcium, and it is this so- 

 called soluble sulphur, calcium sulphide that burns when put 

 on the leaves, if it is strong enough. The commercial con- 

 centrates are made the same way. Is that clear? 



\Tce-President Drew : Question 23, 'Ts it necessary to 

 use more than 150 pounds pressure for spraying?" I am 

 glad to call on Mr. Henry, of Wallingford, to tell us some- 

 thing on that subject. Mr. Henry, won't you give us a few 

 words on that subject, or a few points? 



Mr. Hexrv : Why. I haven't had enough experience in 

 that, Mr. Drew. 



Vice-Pre.sident Drew : Won't you give us some points 

 in your ex]^>eriments, then, last season in spraying, if you 

 don't want to speak on the question itself. I know you have 

 had so much experience in that line everyone would be 

 pleased to hear it. 



Mr. Henry : Why, I don't believe I have' anything, 

 Mr. Drew, but what everybody here already knows. There 

 is nothing that I know of. Prof. Whetzel has certainl\ cov- 

 ered the spraying question, and about the others, I don't 

 know of anything that would be of interest. Mr. Drew. 



