172 TIMBER AND TIMBER TREES. [ CHAP. 
TABLE LXXXIV. 
Tensile Experiments. 
Number = - F Weight the Direct 
of the Dimensions of | Specific |} piece broke | cohesion on 
specimen, each piece. gravity. with, 1 square in. 
Inches. Ibs. Ibs. 
7 752 19,040 | 4,760 
8 765 19,824 4,950 
9 2xX2x30 817 15,120 3,780 
10 720 11,200 2,800 
II 771 10,640 2,660 
Total. . ene 3825 75,824 18,956 
Average. is 765 15,165 3,791 
TABLE LXXXV. 
Vertical Experiments on cubes of — 
Number x Inch. 2 Inches. 3 Inches. 4 Inches. 
of the 
specimens. |Crushed with|Crushed with|Crushed with|Crushed with! 
Tons. Tons. Tons. Tons. 
12—15 2500 12750 27'250 38°750 
16—19 2°750 11°875 27°375 39°150 
20—23 2°875 13°625 26°800 38625 
24—27 2°875 13°750 27°425 397100 
Total. .| 4r1'000 52°000 108°85 155°625 
Average . 2°750 13000 27'212 38°906 
Do. perin.| 2°75 > 3°25 3°024 2°431 
Nos, 28 To 36.—Four more pieces—each 2 x 2 x 2 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 4x 4 inches—the one being 8 inches, the other 13 inches in 
length—bore respectively 47°75 tons and 38°5 tons; and one piece— 
12x 12x15 inches in length—bore 481 tons, or 3°34 tons per square inch 
of base. 
E = 771030. S = 2247. 
