



OBSERVATIONS, DURHAM, N, H. 23 



No. 4. Red June. At the first observation leaves fell when the tree was shaken. 

 At the second nine-tenths of the foliage had fallen and the remaining leaves were 

 badly burned. 



No. 5. Wickson and Abundance. At the first observation the leaves of the former 

 tree fell readily when shaken, and burned leaves were numerous on the latter. At 

 the second observation one-half of the foliage of both had fallen, but new leaves 

 were putting forth. 



-ZVo. 6. Wickson and Sultan. At the first observation leaves fell when the trees were 

 shaken. At the second one-third of the foliage had fallen, but new leaves were put- 

 ting forth. 



RESULTS. 



These results, obtained as they were by one spraying of one or two 

 trees by each sample, are not considered conclusive; a tabulation of 

 the results of several sprayings would be more significant. However, 

 from the results obtained it would appear that it is not safe to- spray 

 apple trees with Paris Green containing more than 4 per cent of solu- 

 ble arsenious oxid without lime; with lime not more than 6 per cent 

 should be present. None of the samples, either with or without lime, 

 appears to be safe on peach foliage. The smallest percentage used on 

 plum trees was 5 per cent of soluble arsenious oxid, and that was too 

 strong without lime, but from the results obtained with 5 per cent of 

 soluble arsenious oxid with lime, it would seem that 4 per cent with 

 lime would be safe. 



REPORT FROM THE NEW HAMPSHIRE STATION, DURHAM. 



- By C. M. WEED and J. L. RANDALL. 



Plum and apple trees were used for this experiment, as they were 

 the only ones available for the purpose at the time. All the trees 

 were of thrifty growth, the apples of five years bearing and the plums 

 of two. years. They were all of the same age and practically the same 

 height. The trees were sprayed on July 28, which was warm and 

 clear, and the effect on the foliage, whenever there was any, was noted 

 within less than twenty-four hours. The following notes were taken: 



OBSERVATIONS. 



APPLES (WITHOUT LIME). 



Baldwin apples were used exclusively both for the experiments with 

 and without lime. 



No. 1 showed several burnt spots, but was not severely injured and no leaves fell. 



No. 2 did not differ from No. 1 and the spots were not very abundant. 



No. 3, although there seemed to be no cause for it, was burned more than any 

 other tree except No. 6. Brown blotches appeared on a large part of the foliage and 

 a few leaves curled as if about to fall. 



Nos. 4 and 5 both had many burned spots and some blotches. None of the leaves 

 curled, except occasionally when a blotch or spot came to the edge of the leaf. 



