11 
This strength was taken for the trial, comparison being made with 
a much stronger solution, and also with pure water. The trial was made 
in duplicate, one set in the green-house, the other in the open ground, 
the other conditions being the same. The seed was soaked in each 
case twenty-four hours, and planted May 17, 100 kernels in a place 
as in the other tests. The examination was made daily, and, as in the 
other cases, as nearly as practicable at the same hour, usually at G a. 
m. The record begins on the day upon which the first plants appeared 
above ground. 
IV .—Copperas upon corn. 
Bate. 
(a) In the green-liouse. 
(b) In the open ground. 
Water. 
Copperas, 
1 pound 
per 
bushel. 
Copperas 
very 
strong. 
Water. 
Copperas, 
1 pound 
per 
bushel. 
Copperas 
very 
strong. 
May 24. 
51 
35 
16 
12 
1 
1 
May 25. 
84 
70 
45 
45 
32 
20 
May 26... 
91 
79 
68 
68 
65 
59 
May 27. 
94 
86 
72 
80 
76 
73 
May 28. 
94 
87 
80 
82 
80 
74 
May 29. . 
94 
88 
85 
83 
81 
79 
May 30. 
94 
93 
86 
84 
86 
79 
A comparison of Tables IY with Tables I and II is sufficient to show 
that green vitriol (copperas) has nearly as injurious an effect upon the 
seed as blue vitriol. There was no scorching of the leaves noticeable, 
however, resulting from treatment with copperas, even with the strong¬ 
est solution. 
TREATMENT OF BLACK-ROT, BROWN-ROT, DOWNY MILDEW, 
POWDERY MILDEW, AND ANTHRACNOSE OF THE GRAPE; PEAR 
SCAB AND LEAF-BLIGHT, AND APPLE POWDERY MILDEW. 
By B. T. Galloway. 
BLACK-ROT.* 
The experiments of the past two years have demonstrated beyond 
question the possibility of cheaply and effectively preventing this dis¬ 
ease. Many things, however, in connection with its treatment remain 
to be discovered, so that rules now laid down will probably have to be 
modified, as future work gives us a better insight into the nature of the 
disease and the effects of different fungicides upon it. In the light of 
our present knowledge we would suggest the following lines of treat¬ 
ment, from which we will leave our readers to make their own selec- 
*Lcestadia BidwelUi, (Sacc.) V. R. 
