Aug. is, 1918 0/ Oxygen Pressures on Metabolism of Sweet Potato 2 79 
stored in air is a noticeable further increase of sugar apparent. In 
oxygen and in hydrogen a state of equilibrium is practically reached in 
five days. In these experiments also there is only a slight increase in 
reducing sugar in the absence of oxygen. 
Table III .—Changes in composition of sweet potatoes stored for 10 days under different 
conditions 
STORED IN OXYGEN AT 30° C. AND AT ATMOSPHERIC PRESSURE 
Sweet potato. 
No. 
On the basis of fresh material. 
On the basis of dry matter. 
Moisture. 
Starch. 
Reducing 
sugar as 
glucose. 
Cane 
sugar. 
Starch. 
Reducing 
sugar as 
glucose. 
Cane 
sugar. 
Per cent. 
Per cent. 
Per cent. 
Per cent. 
Per cent. 
Per cent. 
Per cent. 
25 ?. 
77-31 
15 - 31 * 
O.31 
I. 92 
67.48 
i. 37 
8.46 
25 b . 
76. 66 
13 - 57 
1.68 
2. 68 
58.14 
7. 20 
II. 48 
26a. 
75 - 94 
16.45 
. 22 
1.71 
68.37 
.91 
7. II 
26b. 
76.88 
12. 8l 
1. 20 
3-32 
55 - 4 i 
5 - J 9 
14. 36 
27a. 
75 - 77 
l6. 63 
•32 
2. 12 
68. 64 
1. 32 
8-75 
27b. 
76.14 
13-77 
1.44 
3-21 
57-71 
6.04 
13. 46 
28a. 
73 - 85 
l8. 76 
•23 
I. 94 
7 1 - 74 
.88 
7 . 42 
28b. 
75 - 07 
14.63 
i- 33 
3-64 
5 8 - 69 
5 - 34 
14. 60 
29a... 
72. 82 
19. 8l 
.42 
I. 90 
72. 88 
i- 55 
6.99 
29b. 
72.40 
17-37 
i -37 
3*09 
62.94 
4.96 
II. 20 
30a. 
71-94 
20. 70 
•34 
i- 93 
73-77 
1. 21 
6.88 
30b. 
71.96 
17. 42 
1. 42 
3-40 
62. 13 
5.06 
12. 13 
STORED IN AIR AT 30° C. AND AT ATMOSPHERIC PRESSURE 
3^. 
75-86 
15-9° 
0. 30 
2-55 
65.87 
1. 24 
10. 56 
3 lb . 
74-63 
15- 58 
1. 36 
3- ib 
61. 41 
5-37 
12. 46 
32a . 
73- 47 
l8. 41 
•23 
2. 38 
69- 39 
.87 
8. 71 
32b . 
72. 72 
17. I 9 
• 79 
3- 45 
63.01 
2.89 
12. 65 
33a . 
73-97 
l8. 04 
'V 
2. 40 
69.31 
1. 04 
9. 22 
33 b . 
73- 97 
15. 96 
.83 
3- 57 
61.32 
3- I 9 
13- 72 
34a . 
76.14 
15-97 
.24 
2.13 
66.93 
1. 00 
8.93 
34 b . 
75-4° 
14. 49 
1.06 
3- 5b 
58.90 
4-31 
14.47 
35a. 
76.33 
16. 24 
•45 
2.05 
68. 61 
1. 90 
8. 66 
35 b . 
75.26 
14. 50 
1. 17 
3-^3 
58. 61 
4*73 
14.67 
3^ . 
74- 59 
i7- 55 
•3b 
2. 48 
69.07 
1. 42 
9- 7b 
36b. 
73.80 
15-93 
1. 07 
3- 70 
60.80 
4. 08 
14. 12 
STORED IN HYDROGEN AT 30 0 C. AND AT ATMOSPHERIC PRESSURE 
37a. 
75-10 
17. 42 
0. 27 
2. 00 
69. 96 
1. 08 
3.03 
37 b . 
77.21 
12. 56 
• 5i 
4. 26 
55-« 
2. 24 
18. 69 
38a. 
75- 73 
l6. 21 
. 18 
2.43 
66. 79 
•74 
10.01 
33b. 
77.07 
12. 27 
.28 
4- 5 1 
53- 5i 
1. 22 
19.67 
39a. 
74.70 
i7- 33 
• 17 
2. 22 
68. 50 
.67 
8. 77 
39 b . 
75- 89 
13- 34 
•3i 
4. 48 
55* 33 
1. 29 
18. 58 
40a. 
74- 55 
* 17- 59 
. 22 
2-37 
69.12 
.86 
9-3i 
40b. 
76.24 
i3- 5° 
.29 
4- 39 
56. 82 
1. 22 
18. 48 
4ia. 
7S- 80 
16. 26 
.28 
2. 36 
67. 19 
1.16 
9- 75 
4lb. 
75-84 
i3- 75 
.27 
4. 64 
56. 91 
1.12 
19. 21 
42a. 
74-5° 
18. 21 
.27 
1.87 
71. 41 
1. 06 
7- 33 
42b... 
75-64 
14-43 
•37 
4-03 
59- 24 
i- 52 
16.54 
