S toward* — On Endospermic Respiration in Certain Seeds . 423 
Experiment re-established : 
No. of 
objects. 
wt. 
grms. 
Vo/. 
c.c. 
Temp. 
C.° 
After hours 
of > 
respiration. 
C 0 ,%. 
0*%- 
Mgms. 
co 2 . 
COf 0 2 • 
2-2 
1 7 ° 
2 
4-194 
I4-8l 
0-03499 
o-8o 
2-0 
» 7 ° 
4 
7.223 
9-486 
0-02739 
o-68 
i-8 
1 8° 
5 
955 
6-25 
0-02598 
0-69 
Experiment 
re-established : 
3 * 1 
22° 
i 4 f 
i 6-57 
0-00 
0-02596 
Exp. 15, Intact seeds steeped 
in (1) 6% CuS 0 4 , 1 
hour ; 
(2) water, 
2 hours ; 
embryos then excised, and endosperms steeped in water 23 hours. 
40 
2-247 
2-50 
1 6° 
5 
4-34 
10.45 
0-01792 
0.45 
2-30 
17 0 
6 
5-784 
8-063 
0-01824 
0-48 
Experiment 
re-established : 
2-60 
* 7 ° 
is* 
l6-82 
0-00 
0-01945 
— • 
Diminished Pressure Experiments. 
In each of the following experiments the endosperms were subjected 
to a pressure of 10 m.m. for 15 minutes just prior to the establishment of 
the experiment: — 
Exp. 16. Intact seeds steeped in (1) 3% CuS 0 4 , 2 hours; (2) water, 22 hours; 
embryos then excised. 
30 i-8i 3-25 1 4 0 3 0*465 16-84 0-005176 0-14 
2-70 2 3 0 23 9-824 0-877 0*01154 0-50 
Exp. 17. Intact seeds steeped in (1) 3% CuS 0 4 , 2 hours; (2) water, 46 hours; 
embryos then excised. 
35 i *935 2 *2 13° 4 i *744 i 5* 6 9 0-009294 0-40 
2-o ii° 24 12-61 o-oo 0-01025 — 
Exp. 18. Intact seeds steeped in (1) 6% CuS 0 4 , 1 hour; (2) water, 2 hours; 
embryos then excised, and endosperms steeped in water 23 hours. 
32 1-870 2-6 18 0 3f 2-255 15-35 0-01541 0.47 
Exp. 19. Intact seeds steeped in (1) 3% CuS 0 4 , 2 hours; (2) water, 46 hours ; 
embryos then excised. 
40 2-215 2-70 1 4 0 4 3*004 12-87 0-01710 0-40 
Endosperms (Summer Experiments). 
Material derived from dry resting seeds by degerming them, and 
steeped either in (a) saturated aqueous chloroform or (b) 4 % formaldehyde 
solution. 
