XXXIV.] 
YELLOW PLNE. 
283 
And of the tensile : 
The pieces I and 
I', s.g. 543, broke with 1,925 lbs. 
» 2 ,, 
2', ,, 548, 
,, 
2,510 „ 
>, 3 ,. 
3 '. » 559 . 
9 9 
2 , 45 ° .. 
5 ) 4 ., 
4 '. 563. 
9 9 
2,152 ,, 
We find here that the denser layers are at 4 and 4', 
near the outside of the log, but we are not sure as to the 
amount of wood removed in hewing it, so that it may 
perhaps compare with the specimens in Table CXLIX. 
as to position of growth. It will be seen that the point 
of greatest transverse strength is at or near 3 and 3', and 
that of the tensile at or near 2 and 2 . 
There is a marked difference in the strength of the 
wood on the two sides of this tree, since 1, 2, 3, and 4 
have a mean transverse strength of 556, and 1 , 2 , 3', and 
4' of 453 only, the difference being 103, or about 18 per 
cent. This is further remarkable in the tensile strength, 
since 1, 2, 3, and 4 have a mean strength of 2599, and 
T, 2 ', 3', and 4' of 1920 only, the difference being 679, 
or about 26 per cent. 
Tadle cli. 
Tensile Experiments . 
Number 
of the 
specimen. 
Dimensions 
of 
the pieces. 
Specific 
gravity. 
Weight the 
piece broke 
with. 
Direct 
cohesion on 
1 square in. 
30 
37 
38 
Inches. 
| 2 X 2 X 30 | 
464 
444 
506 
lbs. 
7,280 
7,840 
9.205 
lbs. 
1,820 
1,960 
2,301 
Total . . 
1414 
24,325 
6,o8l 
Average . 
471 
8,108 
2,027 
