Page:Timber and Timber Trees, Native and Foreign.djvu/319

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centric circles than to the centre or pith of the tree. Subsequently, from the specimens above-mentioned, I obtained four serviceable pieces, 2 feet 6 inches in length, for the purpose of ascertaining their tensile strength, and found the maximum to lie in the piece marked c as before.

Table CLXI.
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	d	$\scriptstyle {\left.{\begin{matrix}\ \\\\\ \\\ \\\ \ \end{matrix}}\right\}\,}$	2 × 2 × 30	$\scriptstyle {\left\{{\begin{matrix}\ \\\\\ \\\ \\\ \ \end{matrix}}\right.}$	525	16,244	4,061
8	c				529	20,440	5,110
9	b				529	17,920	4,480
10	a				520	18,080	4,520
Total		...			2103	72,684	18,171
Average		...			526	18,171	4,543

 

Table CLXII.
Vertical Experiments on cubes of—

Number of the specimen.	1 Inch.	Inches.	3 Inches.	4 Inches.
	Crushed with	Crushed with	Crushed with	Crushed with
	Tons.	Tons.	Tons.	Tons.
11–14	3.1250	10.750	24.500	45.750
15–18	3.5000	10.000	24.500	48.000
19, 20	3.125	10.700	—	—
21, 22	3.000	10.750	—	—
Total	12.750	42.000	49.000	93.750
Average	3.190	10.500	24.500	46.875
Do. per in.	3.190	2.625	2.722	2.929