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THE CONNECTICUT POMOLOGICAL SOCIETY. 



got in that last plot this year perhaps two per cent, where 

 we used the arsenate alone, but down at Washins^on the 

 Bureau of Chemistry reports a very conspicuous injury from 

 the use of lead arsenate alone on peaches. 



Dr. Clinton : We have data from orchards in this state 

 where arsenate of lead was used, not the true ortho-arsen- 

 ate of lead, showing that the spraying of the night before 

 produced no injury, but that of the next morning produced 

 serious injury. 



Dr. Stewart: I presume it was this mixed arsenate of 

 lead. 



Dr. Clinton : Yes, but the sanie brand each time. 



Dr. Stewart: There is no reason, so far as I know, 

 why this mixed arsenate of lead should not be causing 

 regularly more injury than we have obtained from it. In 

 fact, it has been a surprise to me that we have been get- 

 ting so little injury from it. Whether these cases which 

 have been cited where it has produced injury were under 

 similar conditions or not, of course, I do not know. 



Dr. Clinton : We think it was uniformly mixed. There 

 is another factor that comes in there evidently. Did not 

 the weather conditions have something to do with it? 



Dr. Stewart: Well, we are agreed there that we do 

 not know. We have had two unusual years, each giving 

 different types of results, and it is a question whether we 

 can always depend upon anything as being absolutely safe, 

 for the conditions one year which seem to make it relia- 

 ble seem unreliable another year, or in an exceptional year. 



A ]\Iember: Dr. Stewart says that the proper amount 

 of arsenical application he thinks has an effect upon the 

 color of our fruit, but he thinks, as I understood him in 

 his paper, that they have not been able to increase that 

 through applications of plant food. Certain growers in 

 Connecticut are using basic slag, and are claiming that 

 they are getting some good results. I would like to know 



