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descriptions given, if they do represent different fungi, are not suffi¬ 
ciently accurate to give us any criterion of identification. 
In the Annual Report for 1888 Mr. Galloway described a fungus caus¬ 
ing the bitter rot of apples, which he identified as Berkeley’s fungus 
Glceosporiumfructigenum , and which agreed closely with the herbarium 
specimens. 
In the summer of 1888 Prof. F. L. Scribner found what he supposed 
to be a new fungus on the grape in the Department grounds. He 
examined it, but as its similarity to bitter rot of grapes threw some doubt 
on its specific value no further observations in regard to it were made. 
In the following season it was found again by the writer, and since then 
it has come to the Department from several sources. 
A study of its structure at once suggested a close relationship with 
the fungus causing bitter rot of apples, and also with the one causing 
the bitter rot of grapes. It differs from the latter, however, in several 
points. 
Owing to its similarity of form with bitter rot of the apple, a series of 
experiments was undertaken to ascertain whether or not the two were 
identical. Living spores of the grape fungus Avere inserted under the 
skin of healthy apples by means of a flamed knife, and other apples 
similarly punctured but not having the spores inserted were used as 
checks. At least twelve apples were thus infected, each apple being 
infected at three points. In every case but one the fungus developed,' 
and with but one exception at all of the infected points. The one ex¬ 
ception was where spores were used which a few days later were found 
to be incapable of germination. In case of another apple, spores were 
purposely used which were supposed to be past the power of germina¬ 
tion. The result was that the fungus developed at one point of infec¬ 
tion only, and this was probably the result of carelessness, as the knife 
was not flamed after being used to infect an apple with spores from 
another grape, and the spot into which the knife was first pushed re¬ 
ceived some of these spores that were capable of germination. None 
of the checks developed the fungus. The rot spots began to appear 
in about 3 days, and pustules made their appearance in from 5 to 8 
days. 
Apples attacked by the typical bitter rot fungus were obtained from 
Arkansas, and the spores were used for infecting grapes in a manner 
similar to that described for apples. 
The results were not so striking as in the former case, but in a small 
proportion of the infected grapes typical pustules with spores were 
developed, and this was not true of the checks. Many of the infected 
grapes, which did not show pustules, decayed in a manner typical of 
grapes attacked by the fungus, but grapes were so much harder than 
apples to preserve from the attacks of saprophytic fungi that in most 
cases they succumbed to these before the Gloeosporium had a chance to 
complete its development. The most successful infection experiments 
