82 
Journal of Agricultural Research 
Vol. XXIII, No. 2 
was raised to 62° after eight days at 40°, and the drying was con¬ 
tinued for one day, the rapidity and completeness of germination of oats 
and wheat were reduced to about the figures for the undried controls. 
Barley, after the same treatment, germinated even better than when 
dried only at 40°. This agrees with the statements of others that barley 
is more resistant to the injurious effects of high temperature than are 
the other cereals and in addition seems to indicate that up to the point at 
which injury begins, increasing the drying temperature would increase 
the effectiveness of the treatment. 
Tabi,B I .—Effect of artificial heating and drying 
Average 
Percentage of germination. 
Kind of grain and 
number of samples. 
Drying treatment. 
mois¬ 
ture 
content 
in per¬ 
centage 
of wet 
Average of all 
samples. 
Samples show¬ 
ing greatest 
effect of the 
treatment. 
weight. 
2 days. 
S days. 
2 days. 
S days. 
Wheat, 3 samples 
fControl, not dried. 
12. 3 
8. I I 
a 61 
69 
78 
78 
95 
85 
98 
29 
99 
83 : 
93 
73 1 
83 | 
98 ! 
92 i 
36 | 
100 | 
a 52 
68 
60 
[Dried 5 days at 40° C. 
i 71 
38 
59 
20 
1 
j 76 
68 
Wheat, 4 samples 
fControls, not dried. 
1 
12.4 | 
6. 0 
32 
54 
8 
[Dried 8 days at 40° C. 
98 
62 
Oats, 6 samples... 
f Controls, not dried. 
y 1 
11. 6 
\ Dried 8 days at 40° C. 
5-5 ' 
12-3 ! 
6. 1 
27 
O 
20 
98 
28 
Barley, 3 samples. 
fControls, not dried. 
16 
[Dried 8 days at 40° C. 
71 
47 
68 
I 86 
a 100 
[Controls, not dried. 
I2 « 3 j 
7.0 ; 
4.8 ! 
32 
54 ! 
24 ! 
8 ; 
70 
88 
Wheat, 2 samples. 
Dried 8 days at 40° C. 
Same-}-1 day at 62° C. 
38 
20 1 
50 
62 
Controls, not dried. 
11. 6 ! 
Oats, 5 samples... 
Dried 8 days at 40° C. 
5*5 ! 
4-7 | 
12. 2 ' 
27 
8 
20 | 
98 
Same-}-1 day at 62° C. 
0 j 
7 
74 
Controls, not dried. 
8 
1 
.1 
Barley, 1 sample. 
Dried 8 days at 40° C. 
O | 
5 - 7 ; 
4.7 1 
58 
80 
Same+1 day at 62° C. 
100 
j 
_1 
® In 3 days. 
Tests of several of the samples which showed poorest germination in 
five days were continued two days longer. Germination continued at a 
decreasing rate during this time, but was far from complete at the end 
of the time in case of some of the untreated lots, especially of barley, 
and some of the lots of wheat and oats which had been heated at 62° C. 
EFFECT OF PRESOAKING 
Bleisch (9), .with barley which germinated w T ell without treatment, 
and Andrews and Beals (3), with fully after-ripened maize, have shown 
acceleration of germination as a result of presoaking. Hiltner ( 21 ) and 
Atterberg (6) greatly increased both germinating energy and germinating 
capacity of a number of kinds of freshly harvested cereals by presoaking 
combined with a pricking of the endosperms. Kiessling (28) decided 
that presoaking not after-ripened cereals at various temperatures had a 
uniformly harmful effect as compared with drying at the same tempera¬ 
tures and that this harmful effect was not entirely overcome by the 
