225 
It appears from the foregoing that the total yield of straw and grain 
on the 24 treated plats was 82 pounds, an average of 3.41 pounds per 
plat. The total yield of cleaned grain was 13 pounds, an average of 
8| ounces per plat. The total averages in this case do not differ ma¬ 
terially from those where no treatments were made. It should be borne 
in mind, however, that there were 2 more plats in the untreated lot 
than in the treated$ also, that a number of the treated plats were so 
seriously injured that the yield was very light. Taking out of consid¬ 
eration the reduction in the crop due to the foregoing causes, the 
treated plats gave a somewhat higher average yield than the untreated. 
The results in the treatment ol oats were wholly negative, as no 
rust whatever appeared on any of the plats. It may be of interest to 
say, however, that several of the preparations, notably Nos. 32 and 
35, seriously injured the plants. As a result of this the yield of the 
treated plats was nearly 10 per cent less than the untreated. 
Experiment C. 
Experiment 0 consisted of spraying 1 plat each of late-planted' 
spring wheat and oats with Bordeaux mixture, full strength, combined 
with soap. It was thought that possibly rust would not appear in ex¬ 
periments A and B; consequently the late spring grains, which are 
almost invariably attacked by the disease, were put in. Each plat was- 
33 feet long and 3 feet wide, there being 2 in each case, 1 fox treat¬ 
ment and 1 for control. The sowing was not done until May 20, but 
the weather was so warm that the plants were well up by the 30th of 
the same month. Six treatments in all were made, the dates being 
May 30, June 3,6,16, and 25, and July 5, respectively. No rust of con¬ 
sequence appeared on any of the plats, consequently the results so far 
as concerned the prevention of this disease were negative. 
CONCLUSION. 
The work described in the foregoing pages, carried on under widely 
different conditions of soil and climate, seems to clearly indicate that 
treating the seed and soil previous to planting with various chemicals 
and with hot water is of no value whatever so far as the prevention off 
rust is concerned. This accords with our knowledge of the life history 
of the rust fungi attacking cereals, and bears out the generally accepted 
belief of those who have studied the matter. Many of the soil and 
seed treatments were positively injurious, diminishing the crop to a far 
greater extent than all the diseases observed combined. 
The spraying treatments did, in some cases at least, diminish the 
amount of rust and seemingly increased the yield of straw and grain. 
A slight increase of yield in an experiment of this kind, however, must 
be looked upon with a good deal of suspicion, as there are many things 
that might influence the matter one way or another. On the whole 
