TIMBER AND TIMBER TREES. [chap. 
Table CL. —Yellow Pine (Canada). 
Transverse Experiments. — 3 / 7 / Example. 
Number of the 
specimen. 
Deflections. 
Total weight 
required to break 
each piece. 
Specific gravity. 
Weight reduced 
to specific 
gravity 600. 
Weight required 
to break 
1 square inch. 
Tensile 
Experiments. 
With the appa¬ 
ratus weighing 
390 lbs. 
After the 
weight was 
removed. 
At the crisis 
of 
| breaking. 
Direct 
cohesion on 
1 square in. 
Number 
of the 
specimen. 
Inches. 
Inches. 
Inches. 
lbs. 
lbs. 
lbs. 
14. 4 
2 ‘OO 
•65 
3 '°° 
504 
562 
538 
I26-00 
2485 
4. 2S 
15- 3 
175 
•65 
3 ’ 5 ° 
556 
5 6 4 
591 
I39-00 
2800 
3- 29 
16. 2 
1-50 
TO 
475 
665 
530 
753 
l66 -25 
2870 
2. 30 
17. 1 
2-25 
•85 
4 ‘ 5 ° 
498 
560 
533 
124-5° 
2240 
I. 31 
18. 1' 
2-25 
75 
3-25 
513 
526 
585 
128-25 
l6lO 
C. 32 
19. 2' 
2-25 
•85 
2 75 
419 
566 
444 
10475 
2150 
2'- 33 
20. 2 1 
270 
75 
2-85 
421 
544 
464 
105-25 
2100 
3 '• 34 
21. 4' 
2'25 
•65 
3 '°° 
460 
564 
490 
II 5-00 
1820 
4 ; - 35 
Total 
1675 
5-65 
27-60 
4036 
4416 
4398 
1009'OO 
in 
O 
'S 
— 
Aver. 
2-093 
•706 
3'45 
5 ° 4'5 
552 
54975 
126-125 
2259'37 
— 
E = 650960. S = 1324. 
These experiments are similar 
to the last, but the specimens were 
taken from a larger tree, and the 
soft wood about the pith, including 
the heart-shake, was allowed to drop 
out. In this case the woody layers 
were placed vertically in the machine 
for testing them transversely (Fig. 31). 
The mean results of the transverse experiments are 
as follows, viz.:— 
The pieces I and I 
, s.g. 543, broke with 505 lbs. 
E=622720. 
S = i327 
>> 2 ,, 2 , 
>» 548, ,, 542 ,, 
E=75245°- 
S=i4 2 3 
>» 3 >> 3 > 
,, 559, „ 488 „ 
£=976160. 
S=1282 
,* 4 >> 4'j 
,, 563, ,, 482 „ 
£=612170. 
S=i265 
fig. 31. 
