544 
Journal oj Agricultural Research 
Vol. XXX, No. 6 
various age classes up to 100 years and 
in jack pine and spruce swamp types. 
In general they conformed to the 
results here shown, but the number of 
plots on each condition was not suffi¬ 
cient to be conclusive, and conse¬ 
quently they are not included. Al¬ 
together, measurements were recorded 
from over 3,000 increment cores. 
The defoliation on these plots was 
very severe, and all evidence indicates 
that it was quite uniform for the entire 
area. 
The Metis plots, Tables X and XI, 
were chosen because of light budworm 
feeding for comparison with the heavy 
feeding in the Tabusintac area. The 
attack began in 1913. Although the 
percentage of balsam was high, the 
feeding apparently only lasted, with 
any degree of severity, for one year. 
This was reported from observations 
of the company officers who frequently 
visit the place during the summer. It 
is also further substantiated by the 
more rapid recovery, or greater incre¬ 
ment for the 10-year period following 
defoliation, as compared to any other 
regions of Quebec and New Brunswick 
which have been studied. (See Table 
XVIII.) 
The reason 7 for the light feeding, 
which is certainly due to the early 
dying out of the infestation, has been 
unexplained. It may have resulted 
from weather conditions. A similar 
state prevails eastward throughout the 
Gaspe Peninsula. 
This series of plots was selected and 
tallied by Balch and MacAloney. 
The writer had previously visited the 
region on two occasions, but did not 
go over the present work. No attempt 
was made to segregate these plots by 
types or quality sites. 
This region as a whole is character¬ 
ized by preponderance of white spruce 
over red spruce. 
Table IV.— Composition of plots , Bathurst, New Brunswick 
No. 
Bal¬ 
sam 
Red 
spruce 
White 
spruce 
Hard¬ 
woods 
Num¬ 
ber of 
trees 
Aver¬ 
age 
diam¬ 
eter a 
Basal 
area 
Height 
Largest trees 6 
Num¬ 
ber 
D. b. h. 
Per cent 
Per cent 
Per cent 
Per cent 
Inches 
Sq. in. 
Feet 
Inches 
7a_ 
7.1 
92.9 
0 
0 
70 
5.3 
10. 68 
45 
6 
8 
7_ 
0.0 
100.0 
0 
0 
108 
5.7 
19.02 
55 
3 
9 
8_ 
3.8 
96.2 
0 
0 
105 
5.6 
18. 40 
50 
2 
10 
9.__ 
2.1 
97.9 
0 
0 
96 
5.7 
17. 21 
55 
3 
0 
7c_ 
13.2 
86.8 
0 
0 
106 
5.9 
20.31 
60 
2 
10 
a Includes trees 3 inches d. b. h. and over. 
b The expression “Largest trees, d. b. h.,” indicates the diameter class of the largest trees, and “Num¬ 
ber, ” the number of trees in that class. 
Table V.— Radial increment in millimeters at d. h. h. from 1903 to 1912 , inclusive y 
and mortality, of trees in plots of Table IV ° 
No. 
Dead 
spruce 
Radial increment of spruce 
Living 
Dead 
All 
Per cent 
7a___ 
13.8 
8.6 
5.8 
8.2 
7___ . _ _ _ 
14. 7 
8.4 
7.3 
8.2 
8.__ 
21. 7 
7.3 
5.8 
7.0 
9... ___ 
50.0 
6.7 
6.2 
6.4 
7c __ ___ 
49.0 
5. 5 
4.4 
5.0 
Average_ _ 
7.6 
5.8 
6.9 
(94) 
(54) 
° Figures in parentheses refer to number of measurements. 
7 Heavy rainstorms at the time of opening of the buds and severe frosts, killing the new growth, have 
both been reported by Tothill and Craighead as causing high mortality in the budworm larvae. 
