267 
Water-conductivity in Sycamore Wood . 
the shoot, and this is the information given in the following table, which in- 
cludes also corrected figures for the Hazel and Ash shoots on the same 
basis. In this way, however, the shorter internodes have more weight 
in determining the averages, when compared with averages taken from 
values for equal lengths. From such considerations it is evident that 
no very close correlation can be expected between the two sets of figures. 
Hazel. Ash . Sycamore. 
Specimen. 
Average of 
values for C. 
Specimen. 
Average of 
values for C. 
Specimen. 
Average of 
values for C. 
H 7 
10.264 
A 3 
4.596 
S 2 1 
l at end of 
’17 
IO *354 
H 8 
10.296 
A 4 
4.1 12 
l 
’18 
1 1.014 
Separate 
h 9 
11. 712 
A 6 
7.722 
s 2 ! 
1 >> 
’*5 
io *8 5 7 
averages. 
H 10 
14.512 
3 \ 
! „ 
’16 
10.095 
S 4 • 
1 ” 
’i 7 
12-523 
* l 
1 .. 
T8 
n.94 
S 5 
5? 
T8 
12-849 
Total 
46.784 
16.43 
79.632 
General average 
1 1*696 
5*476 
11.376 
Farmer’s figures 
for specific con- 
ductivity. 
Stool 
shoots 
3 i ± 9 
( 5 » P- 2 48 ) 
Stool 
shoots 
i4± 10 
(5, p. 248^ 
Young trees, 
2 and 3 years old 
34*63 ± 5*5 
( 5 , P- 239) 
The averages given in the above table were selected to give the fairest 
comparison with the figures quoted in the last line. The remaining 
averages, not included above, are given in the table which follows : 
Ash. Sycamore. 
0 , . Average 
Specimen. ^ y 
Specimen. A Jg a g 
Specimen. 
Average 
for C. 
Specimen. 
Average 
for C . 
A 8 a 
4*544 
s 5^ 
15.008 
S 2, at end of T6 
T 4*343 
( at end of T4 
11-203 
A U 
6.59 
S 5 C 
10.45 
S4, „ T6 
14.838 
S3 „ ’i 7 
9*503 
A 8 e 
7‘5 
S 5* 
14-656 
S 5) a l 7 
11-56 
1 „ ’18 
9-098 
Summary. 
In this paper are described the results of an investigation into the 
constitution of the wood of young Sycamore plants, with special reference 
to its efficiency for the conduction of water. The work is a continuation of 
that begun on stool shoots of Hazel and Ash, but the observations are not 
confined to first-year wood. The writer takes this opportunity of correcting 
a mistake which appears in some of the figures given in the earlier papers. 
With regard to wood of the second and outer annual rings, it is pointed out 
that there is less variation in the specific conductivity for water than in the 
first-year wood ; the vessels are wider, but less abundant, and this tends to 
make the figures for specific conductivity become somewhat lower. In 
general the specific conductivity in the wood of young Sycamore plants, 
estimated in its transverse aspect, is near that found for Hazel stool shoots, 
and higher than that for Ash. 
