Nov. io, 1923 Osmotic Pressure of the Juices of the Potato Plant 247 
Table II .—Comparative cryoscopic readings in IQ20 —Continued 
No. 
98 
99 
100 
101 
102 
103 
104 
105 
106 
107 
108 
109 
no 
111 
112 
n 3 
Date. 
Weather. 
Sept, s. 
Hot in sunshine; some haze. 
Sept. 5. 
Hot in sunshine; some haze; 
some tip burn; tubers over a 
pound in weight. 
vSept. 14, 3 p. m. . 
Cool and cloudy; rain for 3 or 4 
days; plenty of tip burn and 
some blight; some yellow 
leaves. 
Variety and portion of plant. 
Dahlia: 
Foliage. 
Stems. 
New tubers. 
Artichokes from garden; 
growth had ceased: 
Young leaves and tips of j 
stems. i 
Older leaves and petioles ; 
Stems.| 
Young tubers.. j 
Dibole’s Russet; no growing 
leaves. Medium-sized leaves 
Of— j 
Foliage.! 
Stems.. 
Tubers. 
Burbank: 
Foliage. 
Depres¬ 
sion. 
o. 695 
. 702 
. 671 
. 861 
1. 024 
. 800 
• 773 
• 803 
.648 
• 589 
• 797 
Stems.; -555 
Tubers. j -553 
Dibble’s Russet: | 
Foliage. j .856 
Stems. j .481 
Tubers. j -546 
Depres¬ 
sion in 
atmos¬ 
pheres. 
8.37 
8. 46 
8. 08 
10.37 
12.33 
9 - 63 
9 - 3 i 
9. 67 
7.81 
7. 10 
9. 60 
6. 69 
6. 66 
10. 31 
5. 80 
6.58 
Table III. —Readings in IQ 21 ; plants all grown in the greenhouse 
Date. 
Remarks. 
Mar. 22 
Plants 1 to 2 inches high. 
Apr. 8 
Apr. 8 
Plants 8 to 10 inches high; new r 
tubers size of pea. 
Plants just coming up. 
May 2 
Large plants past blossoming; some 
of old leaves yellow; new tubers, 
size of a hulled walnut. 
Variety and portion of plant used. 
Depres- 
Depres- sion in 
sion. atmos¬ 
pheres. 
Burbank: 
Aerial portions, 
Seed piece. 
Roots. 
Early Rose: 
Aerial portions 
Seed piece. 
Roots. 
Burbank: 
Leaves. 
Stems.. 
Seed piece. 
Early Rose: 
Leaves. 
Stems. 
Seed piece. 
Green Mountain: 
Leaves. 
o. 494 
• 557 
.464 
5-95 
6. 71 
5 - 59 
525 
53 i 
495 
6- 33 
6. 40 
5 - 96 
586 
525 
527 
7. 06 
6 - 33 
6-35 
593 
517 
373 
7. 14 
6. 23 
4 * 50 
516 
6. 22 
Stems. 
Seed piece. .. 
Sprouts. 
Seed piece... 
Burbank: 
Young leaves 
501 
441 
554 
609 
6.04 
5-31 
6. 68 
7 - 25 
656 
7. 90 
Old leaves.. 
Stems. 
Seed piece. . 
New tubers, 
Early Rose: 
Leaves. 
Stems. 
New tubers, 
506 
607 
300 
545 
6.10 
7 - 3 i 
3- 62 
6. 65 
783 9 - 43 
627 7 - 55 
544 6. 5 i 
