5% Oxygen. 10% Oxygen. 20% Oxygen. 
250 
Franklin Kidd. 
The Influence of Carbon Dioxide and of Oxygen on the 
Sprouting of Potatoes (Factor). 
Date. 
Growth 
interval 
in days. 
Fresh weight of sprouts in grams. 
0% CO, 
10% CO, 
20 % CO, 
40% CO, 
14/6/18. 
14. 
1 -2.* 
0 -6. 
0 
0 
28/6/18. 
14. 
1-5. 
0-5. 
0 
0 
[7-1] (21). 
[5.0] (10). 
12/7/18. 
14. 
11 . 
0-4. 
[3-3] (19). 
[2-1] (19). 
0 
0 
1/8/18. 
20 . 
1 -6. 
0 -1. 
0 
Discarded 
All removed to 
All bad. 
air (1/8/18). 
22/8/18. 
21 . 
09. 
0 -2. 
0 
16/1/18. 
147. 
3-3. 
0 
All dead. 
All sound. 
Half num- 
ber dead. 
14/6/18. 
13. 
2 -0.* 
0 
0 
0 
28/6/18. 
14. 
5-2. 
[12.7] (41) 
0-3. 
[6-0] (5). 
0 
0 
12/7/18. 
14. 
1-5. 
0 -2. 
[3-6] (41). 
[4-0] (5). • 
0 
Discarded 
Half 
1/8/18. 
20 . 
1-7. 
1 -6. 
0 
number bad 
All removed to 
air (1/8/18). 
22/8/18. 
21 . 
0-9. 
0 -8. 
0 
16/1/19. 
147. 
1-3. 
01 . 
0 
All sound. 
All sound. 
Half num- 
ber dead. 
14/6/18. 
13. 
0 5. 
0 
0 
0 
28/6/18. 
14. 
1 -6. 
1-7. 
0 
0 
[4.1] (39). 
[5-6] (30.) 
12/7/18. 
14. 
1-4. 
11 . 
0 
Discarded 
[3.2] (43). 
[2-9] (38). 
All sound. 
1/8/18. 
20 . 
1 -6. 
0-45. 
0 
Removed to air 
(1/8/18.) 
22/8/18. 
21 . 
0-9. 
0-5. 
0 
16/1/19. 
147. 
2 -2. 
0-3. 
0-5 
All sound. 
All sound. 
All sound. 
The figures in square brackets are weights (grams) per 100 sprouts. 
The figures in roind brackets are numbers of sprouts. 
* In the first two weeks the potatoes in 10% Oxygen had produced 
a greater weight of sprouts than those in 20% Oxygen. To check this 
difference, as due to the experimental conditions and not to individual 
variation, the two lots were transposed. In the succeeding periods 
the potatoes in 10% Oxygen continued to produce more sprouts than 
those in 20% Oxygen. 
