216 
might have caused the difference noted. Summing up the results 
of this experiment, it may be said that so far as could be ascertained 
by a careful examination Bordeaux mixture did, to a considerable ex¬ 
tent, prevent rust, but the other preparations had little or no effect 
on the disease. Furthermore in no case did the prevention of rust affect 
the yield to any appreciable extent. 
EXPERIMENTS AT ROCKPORT, KANS. 
Mr. Bartholomew’s farm, where the experiments described in the 
following pages were conducted, is located in Rooks County, latitude 
39° 30' north and longitude 99° 20' west. Three lines of work were 
carried on at his place, which may be designated as experiments A, B, 
and C, respectively. 
Experiment A. 
This experiment was, to a certain extent, the same as that conducted 
with winter wheat at Garrett Park, Md., there being ten kinds of soil 
treatment, seven of seed treatment, six treatments involving spraying, 
and six combining all three of the foregoing. The soil selected for the 
work was rich second bottom, so situated as to render the crops planted 
upon it peculiarly subject to the attacks of rust fungi. In accordance 
with instructions from the Department, Mr. Bartholomew early in Oc¬ 
tober, 1891, staked off 132 plats, each 25 feet long and 4f feet wide. 
From October 9 to 15 the wheat was planted, the variety known as 
“Turkey” being used. The grain was all planted in rows 9 inches 
apart, there being live rows in each plat. Eighteen inches were left 
between plats to serve as walks. The following is a tabular statement 
showing the treatment each plat received: 
Table 7.—Showing manner of treatment of plats in Experiment A, at Eockport, Kan 8. 
Plat. 
Kind of treatment. 
1 and 06 
Untreated. 
2 and 67 
Soil treatment with flowers of sulphur, *5 ounces to 25 feet of row. 
3 and 68 
Untreated. 
4 and 69 
Soil treatment with flowers of sulphur, 21 ounces to 25 feet of row. 
5 and 70 
Untreated. 
6 and 71 
Soil treatment with flowers of sulphur, 11 ounces to 25 feet of row. 
7 and 72 
Untreated. 
8 and 73 
Soil treatment with lime and sulphur, equal parts mixed, 5 ounces to25 feet ofrow. 
9 and 74 
Untreated. 
10 and 75 
Soil treatment with lime and sulphur, equal parts mixed, 2b ounces to 25 feet ofrow. 
11 and 76 
Untreated. 
12 and 77 
Soil treatment with powdered exsiccated ferrous sulnhate, 5 ounces to 25 feet of row. 
13 and 78 
Untreated. 
14 and 79 
Soil treatment Avit h 5 pints of Avater containing 5 ounces exsiccated f$vrous sulphate 
to 25 feet of row. 
15 and 80 
Untreated. 
16 and 81 
Soil treatment with Bordeaux mixture, 5 pints to 25 feet of roAV. 
17 and 82 
Untreated. 
18 and 83 
Soil treatment Avith 5 pints of water containing 1^ ounces potassium sulphide to 
25 feet of row. 
19 and 84 
Untreated. 
20 and 85 
Soil treatment Avith 5 pints of ammoniacal solution of copper carbonate to 25 feet 
ofrow. 
21 and 86 
Untreated. 
22 and 87 
Seed immersed in water at 133P F. for 15 minutes. 
23 and 88 
Untreated. 
24 and 89 
Seed immersed in an 8:100 solution of copper sulphate for 24 hours, then limed. 
25 and 90 
Untreated. 
26 and 91 
Seed immersed for 24 hours in Bordeaux mixture. 
27 and 92 
Untreated. A 
28 and 93 
Seed immersed lor 24 hours in a 5:100 solution of potassium bichromate. 
29 and 94 
Untreated. 
