626 
Harper .—Defoliation ; its Effects ^lpon the 
( f ) Autumn Wood %. 
1911. 
1910. 
1909. 
1908. 
1907. 
1906. 
Section 13 
50 
60 
70 
40 
a 2 
40 
» 12 
60 
60 
60 
40 
a 
50 
» 11 
50 
50 
50 
30 
a 
40 
,, 10 
40 
5 ° 
50 
30 
a 
50 
„ 9 
50 
60 
50 
30 
a 
30 
„ 8 
50 
50 
40 
30 
a 
40 
» 7 
30 
30 
30 
20 
a 
40 
„ 6 
50 
40 
30 
30 
a 
40 
>1 5 
50 
30 
30 
20 
a 
40 
„ 4 
40 
5 ° 
30 
30 
a 
40 
?> 3 
50 
50 i 
50 
30 
a 
50 
» 2 
70 
5 o 1 
50 
30 
a 
50 
1 
5 ° 
60 
5 ° 
5 ° 
a 
5 ° 
Average of 
thirteen 
sections . 
5 ° 
50 
50 
30 
a 
40 
TABLE IV. 
TREE 
C. 
Height of tree, 35 feet. Sections every 4 
feet from the base up. 
( a ) Ring-rreadtii 
in Millimetres. 
1911. 
1910. 
1909. 
1908. 
I 9 ° 7 - 
1906. 
Section 8 
0*1 
o *9 
1 -6 
1-2 
3*2 
4 -i 
» 7 
0*2 
o *9 
0-9 
o -7 
3.2 
4-6 
„ 6 
0*3 
07 
o-6 
o-6 
3-6 
5*7 
5 j 5 
o -5 
0-4 
°*3 
o *5 
3'7 
5’3 
» 4 
— 
0*2 
0-2 
o*5 
3*5 
5*4 
>> 3 
— 
0*1 
o-i 
o- 4 
3*2 
4*5 
» 2 
- — 
0*1 
O-I 
0-3 
2-8 
4-2 
» 1 
— 
o-i 
o-i 
°*3 
2*5 
4-8 
Average of 
eight 
sections . 
0* I 
0-4 
o -5 
o-6 
3-2 
4-8 
% 
( b ) Autumn Wood %. 
Section 8 
50 
60 
80 
a 
a 
10 
„ 7 
100 
70 
80 
a 
a 
20 
,, 6 
30 
70 
70 
a 
a 
30 
v 5 
100 
80 
30 
a 
a 
30 
» 4 
— 
TOO 
50 
a 
a 
30 
„ 3 
— 
5 ° 
50 
a 
a 
50 
,, 2 
— 
— 
— 
a 
a 
40 
1 
— 
— 
— 
a 
a 
40 
Average of 
eight 
30 
50 
5 ° 
a 
a 
3 ° 
sections . 
1 As these measurements are approximated to the first place of decimals (p. 623), the autumn 
wood is not expressed at all when it is less than 0.05 mm. in breadth. When more than 0*05 mm. 
broad the autumn wood would be expressed as o-i mm., so that when the whole ring-breadth sinks 
to o«i mm. (as in the cases marked thus x ) these tables can no longer express the percentage of 
autumn wood. An assumption of 50 per cent, has been made in such cases, and the error so caused 
is a slight one when averaged for the whole tree. 
2 The letter ‘ a ’ is used in these tables to signify that the autumn wood is abnormal in that its 
cell-walls are not properly thickened, at least towards the boundary of the ring. In such cases 
measurements would be misleading. 
