

continued. 
f water- 
f air in 
vapour in leaf over that o 
millimetres of mercury. 
=== 

Excess of partial pressure o 
CO, per square decimetre per hour. 
Transpiration in grammes of water 
per square decimetre per hour. 
2 Assimilation in cubic centimetres of 
= Estimated temperature of leaf. 
bo 
wa 
a 
= 
w 
wa 

17°6| 2:06 | *4°00| 0 4096 
17 °5 1°96 | *4:°00 | 0 3303 
23°5| 9:97 | *4:00| 2-179 
22:1) 8:23 | *4:00|1°763 

19°3| 9°73 | *4-00/ 1-744 
18:2; 8°63 *4-°0U| 1-599 

19°8| 9:05 | *4:00/ 1-470 
19‘1/ 8:32 ¥*4-00/1-183 



values were estimated, not obtained by direct experiment. 


Loss or gain of energy by the leaf in calories per square 
centimetre of leaf-lamina per minute. 

<= R. Solar radiation incident 
on leaf. 
—_ 
tS 
wm 
0°1179 
0 0736 © 
0 °4288 
0°2144 | 
O °4080 
0 2040 
0 °2468 
0 °1234 

Coefficient of absorp- 
tion. 


Solar radiation ab- 
sorbed by leaf. 
= Ra. 
f=) 
4 
0 0808 
0 0505 
0 °3319 
0 °1659 
0 °3158 
0 °1579 
0 -1910 
0 0955 
=| A 
E B 
S | 
a 3) 
S 4 
coon eae 
. a) 
3) s S 
b> S eas 
oo 8 nS 
= S oS 
o's qa 
qs ics] < 
eS 8 
2 S 
is} ae 
3 S 
(17) | (18) 

00033 01463 
00033 0-167 


1905.| On the Physiological Processes of Green Leaves. 
109 


W+w. Total energy used 
for internal work. 
aw 
= 
Ne) 
wma 
0 0437 
0 °0363 
0 °2184 
0 °1769 
0°1751 
0 °1609 
0 -1496 
0 -1200 


Energy lost by re-radia- 
tion and air-convection. 
i? 
So 
0 -0371 
0 0139 

Energy re- 
ceived from surroundings. 
® (W+w)—Ra. 
— 


