Respiratory Activity of the Gynaeceum. 495 
Irregularities manifest themselves in the previous set of experiments, 
though the data show a higher degree of respiratory activity in the 
pollinated specimens than in the unpollinated, as represented by the weight 
of carbon-dioxide evolved. The difference between the specimens which 
had been pollinated for five days was twenty, whilst in those which had 
been pollinated four days it was five. 
All through the experiments it was a practically universal rule that 
the respiratory quotient was higher in the pollinated gynaeceums, but here 
an exception is observed in the second pair of experiments. 
GYNAECEUMS OF ANTIRRHINUM MAJUS , 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. 
Duration of 
experiment. 
1 1 
1 1 
$ 81 ° 
48 
7/12/06 
Pollinated, corolla 
just falling off, 
opened 5 days 
21° C. 
4C.C. 
3-4 
9-5 
2.5 hours 
•56 
48 
7/1 2 /06 
Unpollinated flowers 
opened the same 
time as above 
21° C. 
4C.C. 
i -3 
4-5 
2-5 hours 
.69 
J 35 
8/4/07 
Pollinated flowers 
opened 5 days 
i7-5°C. 
5 c.c. 
3.0 
7-5 
2 hours 
•73 
120 
8/4/07 
Unpollinated flowers 
opened 5 days 
i7*5° C. 
5 c.c. 
2-2 
*•5 
2 hours 
• ] 8 
120 
8/4/07 
Pollinated flowers 
opened 5 days 
T 7-5°C. 
5 c.c. 
4-0 
12-0 
2-3 hours 
•95 
120 
8/4/07 
Unpollinated flowers 
opened 5 days 
I 7'5°C. 
5 c.c. 
3 -o 
5-0 
2-3 hours 
• 5 ° 
The carbon-dioxide production in the pollinated material bears a ratio 
to the production in the unpollinated material of 290 : no. 
Also the average respiratory quotients were as 0-75 : 0-46. 
