No. 
i 
2 
3 
4 
5 
6 
7 
8 
9 
io 
ii 
12 
13 
14 
15 
16 
17 
18 
19 
20 
21 
22 
«3 
24 
25 
26 
27 
28 
29 
30 
31 
32 
33 
34 
35 
36 
37 
38 
39 
40 
41 
42 
43 
44 
Journal of Agricultural Research 
Vol. XXVI, No. 6 
Table I. —Comparative cryoscopic readings in IQIQ 
Material. 
j 
De¬ 
pres¬ 
sion. 
Depres¬ 
sion in 
atmos¬ 
pheres. 
Glu¬ 
cose. 
Su¬ 
crose. 
P.ct. 
P.ct. 
Young leaves.. 
0. 915 
11. 02 
i-31 
0 
Old leaves. 
• 84s 
10.18 
• 74 
•31 
Stems. 
1.089 
13.18 
2. is 
0 
Tubers. 
. 697 
8.396 
. 26 
1.68 
New leaves.... 
.694 
8-34 
. 61 
0 
Old leaves. 
• 747 
7 - 78 
• 74 
0 
Stems. 
. 766 
9. 21 
1. 52 
0 
Tubers. 
■ 555 
6. 66 
•36 
1. 21 
Foliage. 
Stems. 
6. 6<> 
Foliage. 
Stems. 
Tubers. 
Leaves. 
1.047 
12.60 
.84 
• 7 i 
Stems. 
• 735 
8. 85 
.40 
• 14 
Tips of tubers. 
. 672 
8.10 
. 12 
.46 
Butts of tubers 
•635 
7- 65 
•35 
.64 
Leaves. 
. 928 
11. 17 
.91 
• 54 
Stems. 
. 667 
8.02 
•36 
.28 
Inside of tuber 
■ 663 
7-99 
.07 
.48 
Outside of tu- 
.666 
8. 01 
• 07 
. 62 
ber. 
Young leaves.. 
.669 
8. 05 
•56 
0 
Old leaves. 
. 710 
8- 55 
•49 
. 20 
Stems. 
.865 
io- 42 
1. 80 
0 
Tubers. 
•544 
6- 55 
. 62 
•32 
Young leaves.. 
• 750 
9 -o3 
. 6i 
1. 02 
Old leaves. 
* 79 i 
9-52 
.70 
0 
Stems. 
.788 
9.48 
1. 21 
0 
Tubers. 
.580 
6.99 
.89 
0 
Young leaves.. 
.970 
11. 68 
.19 
i- 45 
Old leaves. 
. 811 
9 - 77 
• 03 
.80 
Stems. 
•675 
8. 13 
.89 
19 
Tubers. 
• 522 
6.28 ; 
0 
• 70 
Young leaves.. 
. 980 
ii- 80 
• 19 
1. 48 
Old leaves. 
.807 
9 - 70 
. 06 
.86 
Stems. 
.676 
8.15 
0 
• 54 
Tubers. 
• 572 
6. 88 
0 
. 60 
Young leaves.. 
• 734 
8.83 
.08 
.28 
Old leaves. 
•995 
11. 98 
•52 
0 
Stems. 
.680 
8.19 
.38 
•47 
Young leaves.. 
.849 
10. 24 
•63 
.07 
Old leaves. 
.967 
11. 64 
.69 
.04 
Stems. 
. 708 
8. 52 
•63 
0 
Weather. 
Remarks. 
Hot and dry. . . 
Hot and muggy 
Dry, but show¬ 
ers on Aug. 8. 
Hot and dry... 
Cloudy and 
warm. 
Clear; rain on 
Aug. 19 and 
20. 
Clear.. 
[ Lower leaves 
slightly wilted; 
slight tip burn 
on some plants. 
Tip burn devel¬ 
oped in past few 
days. 
Shaded plants 
grown in tiles. 
Plants grown in 
tiles in the open. 
( Leaves slightly 
wilted and yel¬ 
low. 
►Same as Aug. 12, 
■Healthy plant. 
►Mosaic plant. 
Sample No. 1 from 
heavy clay loam 
soil, Randolph, 
Vt. 
Sample No. 2, from 
}• another part of 
the same field. 
►Healthy plant. 
►Mosaic plant. 
