172 
TIMBER AND TIMBER TREES. [chap. 
Table LXXXIV. 
Tensile Experiments. 
Number 
of the 
specimen. 
Dimensions of 
each piece. 
Specific 
gravity. 
Weight the 
piece broke 
with. 
Direct 
cohesion on 
1 square in. 
Inches. 
lbs. 
lbs. 
7 
. , 
752 
19,040 
4,760 
8 
r \ 
765 
19,824 
4.956 
9 
> 2 x 2 x 30 < 
817 
15,120 
3,780 
10 
\ 1 
720 
11,200 
2,800 
II 
771 
10,640 
2,660 
Total . . 
3825 
75.824 
18,956 
Average. 
765 
I 5 A 65 
3,791 
Table LXXXV. 
Vertical Experiments on cubes of -— 
Number 
1 Inch. 
2 Inches. 
3 Inches. 
4 Inches. 
specimens. 
Crushed with 
Crushed with 
Crushed with 
Crushed with 
12—15 
16—19 
20 — 23 
24—27 
Tons. 
2'500 
2750 
2X75 
2-875 
Tons. 
12- 750 
11-875 
13- 625 
13750 
Tons. 
27-250 
27'375 
26 -8oo 
27 '425 
Tons. 
38750 
39 -I 5 ° 
38- 625 
39- 100 
Total. . 
II -OOO 
52-000 
108 -85 
I 55 ' 6 2 5 
Average . 
2-750 
13-000 
27-212 
38-906 
Do. per in. 
275 
3'25 
3-024 
2-431 
Nos. 28 TO 36.—Four more pieces—each 2x2x2 inches—tried under 
the vertical pressure, took, on the average, 13'937 tons, or 3'484 tons to 
the square inch, to crush them. Two pieces, each 3 x 3—the one 11 inches, 
the other 16 inches in length—bore 27-tons and 25-5 tons. Two other 
pieces, each 4x4 inches—the one being 8 inches, the other 13 inches in 
length—bore respectively 4775 tons and 38-5 tons; and one piece— 
12 x 12 x 15 inches in length—bore 481 tons, or 3'34 tons per square inch 
of base. 
E = 771030. S = 2247. 
