2oO 
TIMBER AND TIMBER TREES. [chap. 
We are thus enabled to compare the strength of the 
earlier and the later growth of this wood. 
Table CXLIX.— Yellow Pine (Canada). 
Transverse Experiments. — 2nd Example. 
0 
Deflections. 
^4 
ft 
73 
73 
Tensile 
Experiments. 
cL’ G 
rt 03 
"> 
= £ 8 
u 3 
u 5 
& 
&J 3 . 
« fca ^ 
" 5^0 
^ g 8 
> rt 
After the 
weight wai 
removed. 
At the crisi 
of 
j breaking. 
Total wei 
required to 
each pie 
ID 
CC 
Cm 
in 
U O >, 
4 -. 
b/) 0 g 
Weight req 
to brcal 
1 square ii 
Direct 
cohesion on 
1 square in. 
Number 
of the 
specimen. 
7 - 3 
Inches. 
.1-50 
Inches. 
TO 
Inches. 
4 - 25 
lbs. 
508 
568 
537 
lbs. 
127-0 
lbs. 
2650 
3. 22 
8. 2 
1-25 
TO 
4‘ 2 5 
562 
600 
562 
HOT 
2800 
2. 23 
9. 1 
I-50 
TO 
2-25 
480 
537 
536 
120 - 0 
00 
1. 24 
10. © 
2-5 
i no 
275 
360 
43 ° 
502 
90 - 0 
0 
11. 1' 
1-85 
■«s 
3-00 
4S0 
58S 
490 
I20 - 0 
2730 
1'. 25 
12. 2 
I -90 
•90 
4' 2 5 
512 
568 
54 i 
128-0 
2800 
2'. 26 
T 
; 
! 
1 75 
•65 
3-00 
478 
5 66 
507 
3080 
3'. 27 
Total 
12 - oo 
5-00 
2375 
3 > 3 So 
3 S 57 
3675 
845 -oo 
i6 >555 
— 
Aver. 
1714 
1 ^ 
3‘393 
482 '85 
55 i 
525 
I20-7I 
2 759 
— 
The mean results of the experiments are as follows, 
viz. :— 
The centre piece © s.g. 430 broke with 360 lbs. E = 785170. S = 945 
,, next pieces 1 and T , 
, 562 
-IX 1 
co 
O 
, E = 902950. S = 1261 
,, 2 „ 2' , 
. 584 
537 „ 
> E = 577020. S = 1425 
ou ter „ 3,, 3',. 
. 5^7 
>> 493 
, E = 822740. S = 1294 
The mean of the 7 pieces being E = 902950 and S = 1267. 
In the above example, there is something like a 
