S toward.— On Endospermic Respiration in Certain Seeds. 429 
Exp. 8. Intact seeds steeped in (1) 6% CuS 0 4 , 8J hours; (2) water, 15J hours; 
embryos then excised. 
No. of 
objects. 
Wt. 
grms. 
Vol. 
c.c. 
Temp. 
C.° 
After hours 
of 
respiration. 
co t % 
0,%. 
Mgms. 
co 2 . 
CO 2 / 0 2 
15 
3-2188 
3.6 
21° 
4 
2*908 
15-87 
0*01483 
0*70 
3*35 
20° 
9 
5*86 
10*12 
0*01240 
0.59 
3 -!° 
21° 
25 
15*74 
0*00 
0*01 106 
— 
Exp. 9. Intact seeds steeped in (1) 6 % CuS 0 4 , 9 hours; embryos then excised, 
and endosperms steeped in (2) water, 15 hours. 
15 2*5014 
3-55 
21° 
4 
2*189 
16*09 
0*01416 
o *55 
3-35 
21° 
8 
5*219 
n -3 6 
0*01593 
o*6o 
2-90 
21° 
24 
I 3 - 3 I 
0*5188 
0*01 177 
o*68 
Exp. 10. Intact seeds steeped in (1) 6 % CuS 0 4 , 9 hours; 
embryos then excised. 
(2) water, 15 hours; 
15 2*9500 4*25 21° 
5 2*309 16*86 
0*01213 0*73 
4*00 21° 
8 4*766 13-02 
0*01473 o*68 
3-55 21 0 
24 13*69 0*2628 0*01252 0*69 
Exp. 11. Intact seeds steeped in 
embryos then excised, and 
(1) 6% CuS 0 4 , 11 J hours; 
pericarp removed. 
(2) water, i2§ hours; 
15 2*7644 4.4 21° 
8 3*623 14*21 
0*01314 0*62 
4*1 21° 
24 12*47 0*7833 0*01405 0*64 
Exp. 12. Intact seeds steeped in (1) 6 % CuS 0 4 , 11J hours ; 
embryos then excised, and pericarp removed. 
(2) water, 36! hours ; 
15 2*9300 4*25 21° 
4 2*019 14*43 
0-01335 0*36 
3.50 21° 
8 4.445 12*54 
o*oi2io 0*59 
Endosperms (Diminished Pressure Experiments). 
Exp. 13. Intact seeds steeped in (1) 6% CuS 0 4 , 8J hours; embryos then excised, 
and endosperms steeped in (2) water, 15^ hours. Prior to establishment of 
respiration experiment, material was subjected to pressure of 20 m.m. for 
40 minutes. 
15 3*0602 4.35 
21° 
4 
2*030 
16-64 
0*01315 
o-6o 
3* 8 5 
21° 
8 
3-831 
12-79 
0*01098 
0-53 
3*60 
21° 
2 3 i 
10*86 
i -795 
0*01002 
o -59 
Exp. 14. Intact seeds steeped in 
(1) 6 % CuS 0 4 , 8ft 
hours; (2) water, 15! hours; 
embryos then excised, and endosperms subjected to pressure of 20 m.m. for 
40 minutes. 
15 2-6416 3-95 
21° 
4 
2-428 
16*86 
0-01655 
0.77 
3-65 
21° 
8 
5-347 
12*18 
0*01684 
0*67 
3-35 
21° 
2 3 
13*68 
0*2618 
0*01407 
0*69 
G 
S 2 
