126 
Journal of Agricultural Research 
Vol. XXIII, No. a 
TABLE VI .—Respiration of Newtown Pippin and York Imperial seeds dormant after 
cold storage in the fruit and incubation at 2$° C. 
Period. 
Hours. 
45 
46 
46 
21 
46 
45 
43 
45 
47 
25 
48 
48 
118 
114 
121 
118 
194 
140 
49 
Temper¬ 
ature. 
°C. 
19 
19 
19 
30 
30 
30 
19 
19 
19 
30 
3 ° 
19 
19 
10 
10 
10 
o 
13 
30 
30 
Gaseous exchanges (mgm. per gm. dry weight) 
per day. 
Oxygen consumed. 
A 1 
96 
85 
8l 
57 
06 
93 
59 
60 
62 
62 
28 
62 
35 
5. 22 
INNER COATS REMOVED 8 
43 
19 
9 - 56 
B* 
O. 80 
•93 
•97 
1. 56 
1.19 
1. 11 
1. 01 
.90 
.84 
i- 33 
1. 00 
.94 
•63 
. 61 
.64 
•65 
•30 
•65 
1-25 
Cos produced. 
A* 
27 
78 
91 
86 
59 
02 
90 
59 
5 i 
5 i 
53 
14 
59 
5 i 
B* 
O. 8l 
.91 
•94 
1. 80 
1.18 
1.03 
.78 
.80 
.69 
1-25 
1. 02 
.78 
•57 
•49 
•54 
.46 
. 16 
•59 
1. 47 
ALL OUTER COATS REMOVED 4 
4 - 54 
5 - 05 
4 - 14 
ALL GERMINATING BY END OP 
PERIOD 
7. 19 
9 - 53 
6. 99 
COj/Oj (volume). 
A 1 
B* 
°-73 
* 7 i 
• 7 i 
.83 
•72 
0. 68 
.67 
•59 
.56 
•77 
.64 
•77 
• 59 
•73 
.68 
.81 
•74 
.70 
. 60 
•72 
.65 
. 61 
•57 
•59 
.58 
. 62 
•50 
•37 
•39 
.70 
.66 
.81 
•85 
.70 
.66 
•72 
.70 
1 Lot A, Newtown Pippin seeds dormant after cold storage in fruit, incubation at 5 0 to xo° C for a few days 
and then 35 0 for 12 days, and previous respiration experiment at 19 0 and 30° for 9 days. 
* Lot B, York Imperial seeds dormant after cold storage in fruit, incubation at 5 0 to 10 0 C. for 4 days and 
at 35 0 for 3H months. 
* See footnote on page 1x8. 
Table VI gives the data for the respiratory exchanges. None of these 
seeds germinated until the last period of the experiment after removal 
of the inner coats. All results were calculated on the basis of the dry 
weight of the material used in each period, whether this included coat 
structures or not. 
1. The respiratory intensity was generally much lower than that of 
the dormant seeds with outer coats removed, which were used in experi¬ 
ment 2, but on account of the method used of computing the results 
in relation to the material actually used, the differences in relation to 
the actively respiring portions were probably not as large as would 
appear from a comparison of the two tables. 
During the last long period (118 hours) at 19 0 C. the respiratory 
intensity was so reduced that for the whole period the average intensity 
was about the same as for the subsequent periods at io° and for a later 
period at 13 0 . It is not possible to state the reason for such a fall in 
respiratory intensity during this period. It can not be the direct result 
of greater reduction in oxygen pressure or greater increase in C 0 2 pres¬ 
sure than in previous periods, since the actual amounts of gaseous 
