492 
White . — The Influence of Pollination on the 
GYNAECEUMS OF DIGITALIS PURPUREA, L. 
Weight of 
material in 
milligrams. 
Date. 
Condition of 
material. 
Tempera- 
ture. 
Vol. of air 
enclosed. 
Vol. per cent, of 
0 2 absorbed by 
material. . 
Milligrams of CO 2 
produced by 10 
grms. of material 
per hour. 
'^1 
. 
11 
a ^ 
Resp. quotient 
volume. 
0 * 
295 
5/12/06 
Pollinated flowers 
opened 5 days 
1 7 ° C. 
5 c.c. 
6.7 
6.9 
2 hours 
■65 
i 290 
5/12/06 
Unpollinated flowers 
opened 5 days 
1 7 °C. 
5 c.c. 
5.0 
3-2 
2.2 hours 
•44 
295 
10/12/0 6 
Pollinated flowers 
opened 5 days 
20° C. 
5 c.c. 
11. 2 
15.0 
2 hours 
J>- 
00 
255 
10/12/06 
Unpollinated flowers 
opened 5 days 
20° C. 
5 c.c. 
9.9 
10-9 
2 hours 
•6i 
J 260 
12/12/06 
Pollinated flowers 
opened 5 days 
17 - 5 ° C, 
5 c.c. 
4*3 
8-8 
2 hours 
•74 
*65 
12/1 2/06 
Unpollinated flowers 
opened 5 days 
Oi 
O 
O 
5 c.c. 
3-9 
5-5 
2 hours 
•56 
j- 
As in previous cases, if the production of C 0 2 is taken as representing 
the respiratory activity, the pollinated material produces 307 grams of C 0 2 
in the same time as a similar weight of unpollinated material produces 
196 grams. There is, however, a wide range between the means of 
successive pairs of experiments. The respiratory quotients for the 
pollinated material average 0-75, and for the unpollinated 0-54, showing- 
less fluctuation and a smaller average difference than in any previous case. 
GYNAECEUMS OF BEGONIA SEMPERFLORENS, Link 
Weight of 
material in 
milligrams. 
1 
Date. 
Condition of 
material. 
Tempera- 
ture. 
Vol. of air 
enclosed. 
Vol. per cent, of 
0 2 absorbed by 
material. 
Milligrams of C0 2 
produced by io 
grms. of material 
per hour. 
Duration of 
experiment. 
i "s* 
1 •§ 1 
1 ^ s 
I 8. g 
j ^ 1 
3 °° ’ 
11/4/07 ' 
Pollinated flowers 
opened 4 days 
i5°C. 
5 c.c. 
1.9 
2.1 
2 hours 
•73 
380 
1 1/4/07 
[ 
Unpollinated flowers 
opened 4 days 
I 5°C. 
5 c.c. 
2.7 
•4 
2 hours 
•29 
265 
12/4/07 
Pollinated flowers 
opened 5 days 
1 6° C. 
5 c.c. 
i *9 
2.4 
2.1 hours 
•73 
325 
1 2/4/07 
Unpollinated flowers 
opened 5 days 
16 0 C. 
5 c.c. 
i*6 
•7 
2-2 hours 
•32 
