49 ° White . — The Influence of Pollination on the 
calophylta is an interesting phenomenon, in all cases the percentage of 
oxygen absorbed being greatly in excess of the carbon-dioxide produced. 
This is probably due to the oily nature of the ovary, some of the oxygen 
combining with the hydrogen of the hydrocarbon to form water, and only 
that which combines with the carbon appearing as an equal volume of 
gaseous carbon-dioxide. 
The ratios between the respiratory activities of the pollinated and 
unpollinated gynaeceums average respectively sixty-seven and forty-two, 
whilst the respiratory quotient is higher in the pollinated material four 
days after pollination, but appears to fall to about the same level on the 
fifth, although the difference in the respiratory activities is as pronounced 
as on the fourth day. 
GYNAECEUMS OF FUCHSIA SERRA TIFOLIA, Ruiz et Pavon 
Weight of 
material in 
milligrams. 
Date. 
Condition Oj 
material. 
Tempera- 
ture. 
Vol. of air 
enclosed. 
Vol. per cent, of 
0 2 absorbed by 
material. 
Milligra77is of CO 2 
produced by 10 
grms. of 7 naterial 
per hour. 
Duration of 
experiment . 
Resp. quotient 
—f VOlU77ie. 
0 0 
300 
19/11/06 
Pollinated flowers j 
opened 4 days 
i8°C. 
5 c * c * 
3-4 
2.4 
2*3 hours 
•53 
250 
19/11/06 
l 
Unpollinated flowers 
opened 4 days 
1 8° C. 
5c.c. 
i-7 
i -5 
i-8 hours 
•43 
270 
21/ 11/06 
Pollinated flowers 
opened 5 days | 
19° C. 
5 c.c. 
3-6 
4.0 
2 hours 
•69 
290 
| 21/11/06 
Unpollinated flowers 
opened 5 days 
i9°C. 
5 c.c. 
3 -i 
2-2 
2 hours 
•45 
480 
26/11/06 
Pollinated flowers 
opened 5 days 
| i 7 - 5 °C. 
5 c.c. 
4.0 
2-1 
2 hours 
•57 
400 
26/11/06 
Unpollinated flowers 
opened 5 days 
**<r 
CJi 
p 
5 c.c. 
3-6 
1.6 
2 hours 
•39 
455 
i 1/1 2 /06 
Pollinated flowers 
opened 4 days 
i8. 5 °C. 
5 c.c. 
1.9 
2.7 
2-3 hours 
•79 
265 
1/12/06 
1 
Unpollinated flowers 
opened 4 days 
i8. 5 °C. 
5 c.c. 
3-9 
1.6 
2 hours 
•50 
In Fuchsia the weight of carbon-dioxide expired per io grms. of 
material was fairly constant, except in one pair of experiments which were 
performed on a different day from the other pairs. For no apparent reason 
the weight of carbon-dioxide given off in both the pollinated and un- 
pollinated material was nearly double the amount evolved on the preceding 
and subsequent days. In many instances, throughout the experiments, 
