120 
Journal of Agricultural Research voi. xxm, no. 
changes was about twice and during the second period about four times 
that for lots A and B, which remained dormant. The respiratory quo¬ 
tients for the two periods were 0.81 and 0.75—a little higher than for lots 
A and B. 
Table II shows the respiratory activity of lots A and B at different 
temperatures during a period of two months. During this time 12 per 
cent of the seeds germinated and were discarded, while a few others were 
discarded on account of injury. All results were calculated on the basis 
of the dry weight of the material actually present in the apparatus 
whether this included the inner coats or these had been removed. 
Both the respiratory intensity and the respiratory quotient rose and 
fell as the temperature of the experiment was raised and lowered. For 
each temperature, there was a fairly definite respiratory quotient which 
was reestablished each time the seeds were brought back to that tempera¬ 
ture from another temperature, either higher or lower. 
Table II .—Respiration of dormant cider press apple seeds with outer coats removed 
Period 
Temper- 
ature. 
Gaseous exchanges (milligrams per gram dry 
weight per day). 
CO2/O3 (volume) 
Oxygen consumed. 
CO2 produced. 
A 1 
B* 
A 1 
B * 
A 1 
B 8 
Hours 
45 
46 
46 
21 
46 
45 
43 
45 
47 
25 
48 
48 
118 
ii 5 
121 
118 
194 
140 
49 
°C 
19 
19 
19 
30 
30 
30 
19 
19 
19 
30 
30 
19 
19 
10 
10 
10 
0 
13 
30 
I. 02 
1. OO 
i- 33 
2.97 
3. 20 
4.23 
2. 86 
2. 80 
2. 77 
5 - 59 
4*40 
3*25 
3 * 3 i 
1. 60 
1. 64 
i- 55 
*43 
1. 81 
4*47 
1- 35 
1. 61 
1. 61 
2. 94 
2. 56 
2. 93 
2. 83 
2 - 53 
i* 39 
2. 05 
i- 95 
1. 81 
1. 28 
.98 
1. 06 
•97 
• 38 
1. 07 
3 * 30 
O. 98 
•99 
1. 36 
3 - 23 
3 - 39 
4 - 73 
2. 61 
2. 57 
2. 48 
5 - 67 
4.70 
3.00 
3- 12 
i -37 
1. 40 
i -35 
. 12 
1. 72 
4. 9 1 
I. 19 
1. 63 
I- 52 
3 - 07 
2.44 
3 - °3 
2. 64 
2. 24 
1-25 
1. 74 
1.85 
1. 69 
1.16 
.76 
.86 
•77 
. 21 
•95 
3*27 
O. 69 
•72 
•74 
*79 
•77 
.81 
.67 
.66 
*65 
•73 
•77 
.67 
.68 
. 62 
. 62 
•63 
. 21 
.69 
• 79 
O. 64 
•73 
.69 
•75 
.69 
•75 
.67 
.64 
•65 
. 61 
.68 
.67 
.65 
•56 
• 59 
•58 
.40 
.64 
• 72 
INNER COATS REMOVED. 3 INCIPIENT GERMINATIONS BY END OP PERIOD 
20 
30 
J 9 - 45 
16.74 
22. 91 
17.87 
•8S 
• 77 
ALL GERMINATING BY END OP PERIOD 
43 
19 
10. 09 
8. 86 
10.30 
9. 61 
•74 
• 78 
1 Lot A was previously incubated under germination conditions at ao° C., 5° days in intact condition, 
then 68 days with outer coats removed. 
* Lot B was previously incubated under germination conditions, 50 days at 30 C in intact condition, 
then 68 days t ao to o° C with outer coats removed 
* See footnote a on page 118. 
