Nov. io, 1923 Osmotic Pressure of the Juices of the Potato Plant 249 
Table IV. Readings of plants all grown in the greenhouse in IQ22 —Continued 
De¬ 
pres¬ 
sion. 
De- 
No. 
Date. 
Weather and remarks. 
Variety and portion of the plant. 
pres- 
sion in 
atmos¬ 
pheres. 
33 
Green Mountain: 
0.991 
1.010 
.808 
34 
12.05 
35 
36 
9* 73 
9 . 06 
8 - 54 
11.44 
11 . 48 
9 . 82 
9 . 02 
7 . 60 
37 
. 709 
38 
Dibble’s Russet: 
39 
40 
.815 
• 749 
•631 
41 
42 
TabIvB V .—Comparative cryoscopic readings in IQ 22 
3 
4 
5 
6 
7 
8 
9 
10 
11 
12 
13 
14 
15 
16 
17 
18 
19 
20 
21 
22 
23 
24 
25 
26 
27 
28 
29 
30 
31 
32 
33 
34 
35 
36 
37 
33 
39 
40 
41 
July 12 
Hot and clear; 87° F., no tip burn... 
Slight tip burn. 
Leaves all of same size on the plants; 
no tubers. 
July 26 
Bright and warm in sunshine, but 
cool in shade and at night. 
July 27 
Hazy, bright, cool; plants grown in 
tiles and watered regularly. 
Plants grown under a cloth shelter 
in tiles and watered regularly. 
Aug. 9 
Clear and bright but very cool; 
almost a frost preceding night. 
Burbank: 
Young leaves. 
Old leaves 
Stems. 
Old seed piece. 
New tubers... 
Green Mountain: 
Young leaves. 
Old leaves.... 
Stems. 
New tubers... 
Dibble’s Russet: 
Young leaves. 
Old leaves.... 
Stems. 
Irish Cobbler: 
Young leaves. 
Old leaves.... 
Stems. 
New tubers... 
Green Mountain: 
Young leaves. 
Old leaves.... 
Stems. 
New tubers... 
Dibble’s Russet: 
Young leaves. 
Old leaves.... 
Stems. 
New tubers. .. 
Green Mountain: 
Young leaves. . 
Old leaves.... 
Stems. 
New tubers... 
Old seed piece. 
Young leaves.. 
Old leaves.... 
Stems. 
Seed pieces.... 
Young leaves. , 
Old leaves.... 
Stems. 
New tubers... 
Dibble’s Russet: 
Young leaves. , 
Old leaves.... 
Stems. 
New tubers... 
0 . 706 
8 . 504 
• 725 
8 . 732 
.718 
8 . 6 S 
•305 
3 - 68 
.581 
7 . 00 
.677 
! 8 . 15 
. 920 
11.08 
. 802 
! 9-66 
•555 
6.69 
. 691 
8.32 
. 761 
9.17 
•659 
7*94 
• 646 
7 . 78 
.728 
8 . 77 
.786 
9-47 
• 565 
6 . 81 
.407 
4.91 
. 788 
9. 49 
.847 
IO. 20 
. 481 
5 - 60 
•456 
5- 50 
. 812 
9 . 78 
• 763 
9 . 19 
.506 
9 . 10 
. 562 
6. 77 
•787 
9- 47 
• 738 
8 . 79 
•439 
5- 29 
• 257 
3- 10 
•357 
4- 30 
.613 
7-37 
.698 
8 . 41 
•333 
4 . 01 
. 706 
8 . 50 
•774 
9-32 
•895 
10 . 78 
• 540 
6 . 51 
.674 
8.12 
. 716 
8 . 62 
. 720 - 
8.67 
.476 
5- 74 
