36 
ered. If we ascribe the larger crop on the sprayed part to the influence 
of the application, it is evident that the figures express but a small part 
of the benefit resulting from the treatment. Aside from the difference 
in crop, the fruits on the unsprayed portion were inferior in size to those 
on the other part. 
A comparison of the results secured the past season with potassium 
sulphide with those secured on the same tree in 1885 and 1887 with soda 
hyposulphite would indicate that the former proved the more effectual. 
Such a comparison, however, may not be just. 
In a second trial, ten trees of the Fall Pippin apple were treated as 
above described, with solutions of three compounds of sulphur,viz: Soda 
hyposulphite, at the rate of half an ounce to 10 gallons; potassium sul¬ 
phide, half an ounce to the gallon ; and calcium sulphide in a saturated 
solution, the spraying in every case being made on the same day and 
in the same manner. The trees were divided into three series, the 
second, fifth, and ninth forming the second, and the third, sixth, and 
tenth the third series. The first sprayings were given June 5, by which 
time the leaves were well expanded. Other sprayings were made June 
16, June 27, and July 2, each of which shortly succeeded a hard rain. 
On September 21 the fruits on the sprayed and unsprayed portions 
of each of the ten trees were picked, with the exception of a belt 
about 3 feet wide across the center of the trees where the sprayed and 
unsprayed parts were supposed to meet. The apples were then assorted 
into three qualities, as described in the case of the crab apple tree, with 
the following results: 
Number 
of fruits 
examined. 
Per cent, 
in first 
quality. 
Per cent, 
in second 
quality. 
Per cent, 
in third 
quality. 
First series—Soda hyposulphite: 
Sprayed part. 
Unsprayed part. 
Per cent, in favor of sprayed part. 
495 
397 
56. 56 
46. 85 
27. 91 
27. 96 
16. 43 
25.19 
9.71 
8. 76 
Second series—Potassium sulphide: 
Sprayed part. 
900 
247 
31.35 
22. 67 
40.11 
36. 03 
28. 54 
41. 39 
Unsprayed part.. 
Per cent, in favor of sprayed part.. 
8. 68 
12.76 
Third seiies—Calcium sulphide: 
Spraved part.. 
315 
129 
28.26 
37.21 
40. 95 
33. 33 
30. 79 
• 29.46 
Unsprayed part. 
Per cent, in favor of unsprayed part. 
8. 95 
.67 
From this trial it does not appear that the potassium sulphide was 
decidedly more effectual than the soda hyposulphite, although as ap¬ 
plied it contained about fifteen times as much sulphur. The soda 
hyposulphite injured the foliage somewhat, and evidently could not 
be safely used in a stronger solution. 
The calcium sulphide apparently did no good whatever. This sub¬ 
stance is only very sparingly soluble in cold water, which may account 
