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yellow, often very depauperate foliage, tinged with red; but these 
characteristics were not often concentrated upon the same tree. The 
microscopic examination proved not at all more definite. Some of 
these trees stood in cultivated.land, but many of them were much 
neglected; they were of all ages. At one place a small hillside 
orchard had become entirely worthless, and only awaited a conveni- 
ent time to be uprooted. In the mean time it was necessary to plow 
and fertilize a portion of it to be cultivated as a garden, and the 
trees of this part had surprised the owner by taking on a most vigor- 
ous and healthy look, with ample deep green foliage. 
The peach trees of the Station of various ages stand in ground 
haying the high cultivation of a garden, and although some of them 
are seriously afflicted with the curl and gummosis, they have shown 
no tendency toward yellow or undersized foliage. A garden or- 
chard across the way, which does not receive so high cultivation, 
shows a corresponding decline in the healthy look of its foliage. 
Judging from these observations and other similar ones, it seems 
evident that cultivation and fertilization of the soil are of more 
than usual importance in maintaining the health and fruitfulness of 
peach trees. I do not, therefore, doubt that in a great many in- 
stances the application of the special fertilizers so ably advocated by 
Professor Penhallow* would produce the desired effect. But so 
long as I am unable to decide to my own satisfaction upon the true 
nature of the yellows as a specific disease, it is obvious that the last 
remark cannot be construed into an advocacy of a remedy for that 
particular ailment. 
In October afew peach trees were found about seven miles from 
the Station which showed every external indication of being in the 
last stages of the yellows. The microscopic examination confirmed 
this belief, showing that the cells were gorged with starch, and had 
the other indications described by Professor Penhallow.t Careful 
examination was now made for bacteria. It was at once apparent 
that if present at all they did not occur in the obvious and abundant 
manner seen in pear blight. Bacteria were occasionally found, and 
in one or two instances seemed to be grouped at one spot, but there 
was no absolute proof that they came from the interior of the tis- 
sues. Here the matter was allowed to rest. J am desirous of mak- 
ing a study of the disease the coming summer in localities where 
one can hope to find it in the fullest development. 
Pracu Curt. 
Eroascus deformans, Tul. 
The curl has been very prevalent in this section of country. In 
the Station orchard it occurred upon some of the largest trees in so 
severe a form that they were all but killed. This was not, however’ 
* Consisting of 25 pounds kieserite, 125 pounds muriate of potash, and 450 
pounds dissolved bone-black per acre, — Houghton Farm, ser. III, No. 2, p. 41. 
+ L. c., p. 31, pl. IL; Trans. Mass, Hort. Soc., 1882, p. 127. 
