248 Groom.—Remarks on the Oecology of Coniferae . 
relative speeds in the various species, as only three or four shoots of several 
of the species were experimented upon. 
In Ewart’s experiments ( 05 ), the maximum rates measured in 
centimetres per hour for different woody plants were : elder 131, apple 121, 
elm 205, pear 248, yew 23. Ewart worked with shoots longer (4-8 ft. long) 
than those I used. 
In the subjoined tables the respective vertical columns, commencing at 
the left hand, represent :— 
1. The number by which the shoot was designated. 
2. The number of minutes during which the cut shoot remained 
dipping in water prior to eosin being supplied to it. 
3. The number of minutes during which the stem remained dipping in 
eosin phis the number of minutes during which the eosin may 
have continued to ascend subsequent to the stem being removed 
from the eosin solution. 
4. The height in centimetres to which the eosin had ascended. 
5. The calculated rates of ascent of the eosin in centimetres per hour. 
6. Any remarks on the shoots or the results obtained. 
LARCH. 
(Experiments made in July.) 
V* 
§ 
in 
eriod 
eosin 
ith 
ime. 
1 «• 
s $ 
.8 
Minutes 
Immersio 
Duration 
minutes of p 
of passage of 
together w 
allowance t 
Distance coz 
by eosin in 
Rate of asce, 
eosin hi cm. 
hour. 
• 
I 
35 
25-5 + 1 
30-5 
72-5 
1 
Set I 
2 
70 
10 + 1 
12 
65 
3 
90 
13-25 + 1 
42 
177 
The dye had entered the foliaged part 
of the axis and the measurement is thus 
a maximum, but the record of the hour 
of the next experiment proves that the 
lowest possible minimum rate was 132. 
Morning: 
warm, 
breezy, 
y sunny ; 
4 
95 
20*25 + 1 
39 + 
110 + 
The dye had reached the terminal bud 
of the shoot, so that this measurement 
no does not record the full rate of 
ascent. 
exposed 
to direct 
sunlight. 
5 
120 
3 +i 
2-5 
38-5 
This shoot had six long branches and 
plenty of foliage: possibly the slow 
ascent was due to entrance of air at 
the cut end of the stem. ' 
6 
150 
5 + 1 
7*5 
75 
1 Afternoon: 
[ cooler, 
7 
180 
6 + 1 
9 
77 
[ less breeze, 
' not sunny. 
