248 
Journal of Agricultural Research 
Vol. XXVI, No. 6 
Table III .—Readings in IQ21; plants all grown in the greenhouse —Continued 
No. 
Date. 
Remarks. 
May 31 
Hot in the greenhouse; the plants 
mature and yellowing; very hot 
on May 30. 
, 
Tubers large... 
June 22 
Hot in the greenhouse; only a tuft 
of green leaves left on each branch; 
soil dry. 
Variety and portion of plant used. 
Depres¬ 
sion. 
Depres¬ 
sion in 
atmos¬ 
pheres. 
Green Mountain: 
Young leaves. 
0. 749 
9.02 
Old leaves. 
•756 
• 546 
9.11 
6.58 
Stems. 
New tubers. 
. 466 
5* 62 
Early Rose: 
Leaves. 
• 703 
8- 47 
Stems. 
.644 
7 * 76 
Tubers. 
•533 
6. 48 
Burbank: 
Leaves. 
.697 
8. 40 
Stems. 
.388 
4. 68 
New tubers. 
•497 
5 - 99 
Green Mountain: 
Leaves. 
•778 
9-37 
Stems.. 
•498 
6. 00 
New tubers. 
•493 
5 - 93 
26 
Table IV .—Readings of plants all grown in the greenhouse in IQ22 
Date. 
Weather and remarks. 
Variety and portion of the plant. 
De¬ 
pres¬ 
sion. 
Apr. 4 
Plants not over 1 to 12 inches high.. 
Green Mountain: 
Sprouts. 
0.651 
. 601 
•633 
• 533 
. 629 
•563 
• 724 
•583 
•893 
• 741 
•509 
• 795 
.628 
.491 
•778 
• 737 
•497 
.860 
• 767 
• 630 
•895 
.828 
• 758 
•590 
•359 
•576 
. 822 
• 771 
• 769 
.666 
• 764 
•529 
Early Rose: 
Burbank: 
Dibble’s Russet: 
Apr. 27 
Plants show flower buds and young 
tubers. 
Early Rose: 
Leaves... 
Dibble’s Russet: 
Burbank: 
Green Mountain: 
June 27 
Hot and fair; tubers large 'with 
skin set; soil dry; old leaves yel¬ 
low and beginning to die. 
Burbank: 
Early Rose: 
New tubers. 
No. 
De¬ 
pres¬ 
sion in 
atmos¬ 
pheres. 
7.84 
7. 24 
7-63 
7.42 
7-58 
6. 78 
8. 72 
7.02 
8. 92 
6.13 
9-57 
7-57 
5 - 92 
9-37 
8.88 
10. 36 
9 - 24 
7 - 59 
10. 78 
9-97 
9 - 13 
7.11 
4-33 
6.94 
9.90 
9. 29 
9. 26 
8.02 
9. 20 
6-37 
