50 
Colorado Experiment Station 
the flour made from it is white and very pleasing to the eye, it is not 
a good bread-making flour, as it only makes from 250 to 260 loaves 
to the barrel. 
, \ 
In the case of the Defiance and also of the Kubanka, we find that 
drying as described, causes ari increase of from 1,000 to about 3,000 
grams in the crushing strength of the kernels, but in the case of the 
Red Fife, we find that drying has lowered the crushing strength. 
Of course, we base all statements on the assumption that 350 kernels, 
taken without choice, is sufficient to give' us a close approximation to 
the average crushing strength of the samples. This number is adopted 
from the Kansas bulletin. Wei were surprised in the first place that 
the Red Fife should show a lower crushing strength than the Defiance, 
in the second place that its crushing strength should be lowered by the 
drying instead of raised, as in case of the other two varieties. It will 
be noticed that the whole series of experiments with the Red Fife was 
repeated, and that the second series corroborated the results of the 
first. I i 
Further, these two series agree as closely as we have any right to 
expect them to agree. Feeling that I might be prejudiced in my results, 
i.e., the discrepancy between my results and the public estimate of the 
wheats experimented with, I requested a friend who is proficient in 
this kind of calculation to analyze the data given in the Kansas bulletin 
and see how closely their groups would agree; the results were more 
disconcerting to me than myt own figures, and I am inclined to allow 
a variation of plus or minus 300 grams or more for single groups of 
350 each. They, of course, may come much closer if the wheat is very 
uniform, which is seldom the case, as is evident on the most casual 
observation of our mixed wheats. The variation which may be found 
in individual samples, due to the flintiness or mealiness of the kernels, 
is indicated by the last six samples given in the second column of the 
table, or eight including the last two samples in the first column. This 
group of samples is given to show the difference in the crushing 
strength of flinty and mealy or yellow-berry kernels selected from the 
same sample, and consequently grown on the same soil under the same 
conditions of cultivation and climate. This difference for Defiance, 
dried at 100° C., is, in round numbers, 4,500, and in the air- 
dried condition 2,100 grams» and for the Kubanka, dried at 100® C., 
5,200 grams. The difference shown by the table between the 
flinty and mealy kernels in the Red Fife sample, 1,7001 grams, is al¬ 
together as significant as the greater differences found for the other 
varieties, because the sample grown with the application of 150 pounds 
of potassium was so badly affected by this condition that the.selection 
of a flinty sample was exceedingly difficult, and the separation was 
