Page:Timber and Timber Trees, Native and Foreign.djvu/283

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Table CXL.
Tensile Experiments.

Number of the specimen.	Dimensions of each piece.			Specific gravity.	Weight the piece broke with.	Direct cohesion on 1 square inch.
		Inches.		lbs.	lbs.
7	$\scriptstyle {\left.{\begin{matrix}\ \\\\\ \\\ \\\ \\\ \ \end{matrix}}\right\}\,}$	2 × 2 × 30	$\scriptstyle {\left\{{\begin{matrix}\ \\\\\ \\\ \\\ \\\ \ \end{matrix}}\right.}$	6l8	14,000	3,500
8				645	13,440	3,360
9				647	19,936	4,984
10				688	19,880	4,970
Total	...			2598	67,256	16,814
Average .	...			649	16,814	4,203

 

Table CXLI.
Vertical Experiments on Cubes of

Number of the specimens.	1 Inch.	2 Inches.	3 Inches.	4 Inches.
	Crushed with	Crushed with	Crushed with	Crushed with
	Tons.	Tons.	Tons.	Tons.
11—14	2.875	10.750	19.625	42.750
15—18	2.750	10.875	19.500	42.500
19, 20	2.875	10.750	—	—
21, 22	3.000	10.375	—	—
Total	11.500	42.750	39.125	85.250
Average .	2.875	10.687	19.562	42.620
Do. per in.	2.875	2.672	2.174	2.663

E = 649130.S=1643.

North America also produces a species of Larch, the well-known Hackmatack (Larix Americana); it is said to be tolerably abundant, and is found to range from the mountains of Virginia to Hudson's Bay.

In deep forests it sometimes attains a height of 60 and