NINETEENTH ANNUAL MEETING. 175 



Question : How much lime and how much sulphur in 

 the self-boiled 



Prof. Scott: 8-8-50. That is the proportion. Eight 

 pounds of lime, eight pounds of sulphur, to fifty gallons of 

 water. 



Mr. Fenn : Would the small percentage of lime used 

 in connection with arsenate of lead, in addition to the lead,, 

 would that have a tendency to produce rust? 



Prof. Scott: No. It would not produce rust. It is 

 not the lime that produces the rust that is seen on fruits. It 

 is the blue stone of the Bordeaux mixture. 



Mr. Fenn : The reason I asked that question was, — I 

 had the pleasure of entertaining Mr. Frost at my home about 

 a year ago. He asked me what I was going to use for spray- 

 ing. I told him I had been using Bordeaux but found it 

 rusted the apples badly. He says, "I would cut out Bor- 

 deaux and use arsenate of lead straight." I had a little ex- 

 perience in my garden. I burned the foliage on the cur- 

 rants and gooseberries, and I thought possibly with the addi" 

 tion of a little lime it would neutralize the burning effect. I 

 did not know whether that was produced by the lime or 

 whether it was because of the arsenate of lead. I buy my 

 chemicals and make my own mixture of arsenate of lead, and 

 I found in conversation with several gentlemen here who are 

 doing the same thing that I am using a larger proportion of 

 arsenate of soda in connection with the sugar of lead than 

 they do. I use two pounds of each for one hundred gallons 

 of water, dissolving them separately, and then pouring the 

 two together. That was the solution. I had a very small 

 percentage of wormy fruit. I do not think over two per 

 cent. It keeps it very free. Whether it was owing to the 

 large per cent of arsenate of soda, I do not know. 



Prof. Scott: I thing you had a good deal of free soda 

 in your mixture. 



