Transpiring Branches. 
435 
the branches lay in a horizontal position on a table close to a 
window. 
June 4, 1896.— Beech-branch (A) with about 1,150 leaves: diameter of cut end 
= § in. : standing 24 hours in water : rather hot, sunny : — 
1.20 p.m. indicator = o in. 
1-25 „ » = H » 
I»3° ff ff = IX 4 ff 
i-33 » (first bubble) = 13 „ 
1 . 4° >f }> ~ x 5l >? 
Readjusted apparatus, removing gas and refilling with water : — 
2.40 p.m. indicator = 0 
in. 
3. 10 p.m. 
indicator 
= 2o| in. 
2.50 ,, „ = 14 
>> 
3.20 „ 
>f 
= 2of „ 
2.55 „ (first bubble) = i6f 
if 
3*35 if 
ff 
= 21J „ 
3 » )» — 
)> 
3 * 4 ° ff 
ff 
= 21J „ 
2 
2.10 
2.20 
urn 
indicator 
M 
II 
in. 
ff 
ff 
II 
M 
OO 
ff 
ff 
ff 
= I9j 
ff 
ff 
ff 
= 20 
ff 
July 1. — Branch of the Yew : freshly cut : about 3 ft. 6 in. long : diameter of 
cut end = | in. : weather cloudy, temp. 64° F. : — 
July t. 
1. 15 p.m. indicator = o in. 
1.25 
ff 
ff 
= 1 
ff 
2.30 
ft 
ff 
= x 3 i 
ff 
3-30 
ff 
ff 
= x 5 l 
ff 
4*30 
ff 
tf 
= i6f 
ff 
5 
ff 
ff 
= * 7 4 l 
ff 
July 2. 
Gas accumulated in tube during the 
night ; gas removed. 
9 
a.m. 
indicator 
= 22 
in. 
10 
»f 
= 22 
yy 
10.30 
ff 
= 22J 
yy 
11 
ff 
= 22J 
yy 
The following is the record of an experiment with the 
Sunflower (. Heliantlms animus) as representing herbaceous 
plants : — 
June 8. — Pot-plant 2 ft. high, with 13 leaves of various sizes : kept in dark room 
and well watered for 40 hours previously to the experiment : stem cut off under 
water : the remaining stump shows strong root-pressure : weather hot, sunny : 
plant began to flag visibly at 11.45 a * m * • — 
11 a.m. 
indicator 
= 
0 
in. 
1.30 p.m. 
(bubbles) 
= 5 ? 
in. 
II * I 5 „ 
ff 
= 
h 
ff 
2 
indicator 
= 6* 
ff 
IX, 3 ° ff 
ff 
= 
ff 
3 ff 
yy 
= 
ff 
Noon 
ff 
— 
2 h 
ff 
4 
yy 
— 92 
ff 
12.30 p.m. 
ff 
= 
3 | 
ff 
5 ff 
yy 
= 11 
ff 
1 p.m. 
ff 
= 
4 | 
ff 
The question now arises as to the significance of such 
figures as these ; what is it that they represent ? This 
question may be met with the reply that they represent the 
