Specimen Number. 
Groom .— Remarks on the Oecology of Coniferae . 249 
LARCH ( continued). 
Minutes of 
Immersion. 
Duration in 
minutes of period 
of passage of eosin 
together with 
allowance tune. 
Distance covered 
by eosin in cm. 
Rate of ascent of 
eosin in cm. per 
hour. 
• 
One 
whole 
day 
7 + 1 
11 
82.5 
(In this and the other shoots of this’ 
set, before experimenting with eosin, 
a piece, i|-2 \ cm. in length, was cut 
off the lower end of the stem under 
water.) This shoot was unbranched, 
40 cm. long, well foliaged at the end, 
and had three isolated tufts of leaves 
on the otherwise unfoliaged basal part. 
The dye had gone past these three 
tufts, but not among the other foliage. 
Set III 
Morning: 
One 
whole 
day 
“•75 + 1 
16.5 
21 
3 i 
99 
“3 
This shoot gave off from the lower 
unfoliaged part of the stem a long 
shoot, so that two measurements are 
given, the first recording the ascent of 
the eosin up the main stem, and the 
second up the basal part of the main 
stem and the long branch. In con¬ 
nexion with the second the time was 
reckoned as being taken at the con¬ 
clusion of the observations on the 
ascent, so that the measurement is 
a minimum one. 
sunny, 
breezy; 
y shoots 
exposed 
to direct 
sunlight. 
One 
whole 
day 
13 + 1 
!3 
56 
This slow rate of ascent is possibly 
due to entrance of air into stem. 
i 
5 ° 
9*5 + 1-5 
26 
142 
The stem ended in a long leafless 
dead part (up which no eosin travelled), 
but gave off a long branch foliaged at 
its terminal part; otherwise there were 
no branches. 
Set II 
70 
5 + 2.5 
25-5 
204 
This shoot bore three long foliaged 
branches and ended in a dead part of 
the relatively main stem: the measure¬ 
ment is up the main stem and thence 
up the topmost foliaged branch. Full 
allowance is made for the ascent of 
eosin after removing from the solution, 
but details of the time of observations 
in the succeeding experiment prove that 
the minimum possible is not less than 
153 for the rate of ascent of the eosin 
per hour. 
The 
shoots 
were 
exposed 
to direct 
. sunlight 
on a warm 
breezy 
July day 
in the 
morning. 
75 
6.5 + 1 
32 > 
240 
This shoot was branched and ended 
in a dead part of the main stem: the 
measurement concerns the ascent up 
the main stem and highest foliaged 
branch. The time of the next observa¬ 
tion absolutely proves that in this case 
the lowest possible minimum rate of 
ascent was 138 cm. per hour. 
