24 PAEI8 GREEN SPRAYING EXPERIMENTS. 



No. 6 was injured the most of any. Large patches appeared on many of the leaves, 

 which turned brown. Under the microscope the cell protoplasm was shrunken in 

 these blotches and in the centers of the smaller spots. 



APPLES (WITH LIME). 



No. 1 had small brown spots on a very few leaves. 



No. 2 was burned more than No. 1, yet the leaves did not fall and the cells were 

 killed only in a few places. 



No. 3 suffered little, if any, more injury than No. 2. 



Nos. 4 and 5 showed some burned spots on the leaves unevenly distributed. These 

 trees were affected about the same as Nos. 1 and 2 without lime. 



No. 6 showed smaller but more numerous spots than those observed on Nos. 4 

 and 5. 



PLUMS (WITHOUT LIME). 



No. 1. Imperial Sage. The leaves showed quite prominent brown spots, which 

 were more numerous in the direct sunlight than on shaded parts of the tree. 



No. 2. Bradshaw. This tree was slightly more damaged than No. 1, but none of 

 the leaves was injured enough to fall. 



No. ."?. Abundance. This tree was damaged more than any other except No. 6. 

 Many of the leaves were curled and a few fell. The tree had not entirely recovered 

 when the leaves fell in the autumn. 



No. 4. Washington. Some of the leaves were burned and curled, but the injury 

 done was not so great as in the case of No. 3. The tree had recovered before the 

 leaves fell. 



No. 5. Yellow Japan. A few leaves curled and fell. This tree was burned more 

 than No. 4 and about the same as No. 3. 



No. fi. Wyant. This tree was burned more than any other. Many of the leaves 

 at the top were half burned and a large number fell. 



PLUMS (WITH LIME). 



No. 1. De Solo. On July 30 this tree showed only a few scattered brown spots on* 

 the leaves. On August 15 it had entirely recovered. 



No. 2. German Prune. The injury was about the same as that inflicted on No. 1, 

 without lime. A few brown spots were observed, which gradually disappeared, until 

 on August 21 the tree had entirely recovered. 



No. 3. Heine Claude. About as much damage was done in this case as to No. 2, 

 without lime, the lime seeming to nullify the effect of about 1 per cent of soluble 

 arsenious oxid. On August 25 the tree had entirely recovered. 



No. 4. Green Gage. The leaves of this tree were burned in round spots, and a few 

 curled; but in thirty days it had entirely recovered. 



No. 5. Satsuma. This tree was damaged about the same as No. 4, without lime. 



No. 6. Weaver. Spots and blotches appeared, and a few leaves fell; but the tree 

 recovered before the season was over. 



The authors of the report from the New Hampshire station prefer 

 not to give an opinion in regard to the amount of soluble arsenious 

 oxid that can be endured by apple and plum trees, as the data obtained 

 is deemed by them insufficient to serve as a basis of such an opinion. 

 It appears, however, to the author that certain tentative conclusions 

 may be drawn which can be compared with the results obtained by the 

 various other stations and definite conclusions thus be obtained. Bas- 



