Page:Timber and Timber Trees, Native and Foreign.djvu/125

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In the experiments that were made, it was found White Oak compared very favourably with all the foreign Oaks, but proved to be slightly inferior in strength to the English Oak.

Table XXXVIII.—American (or Pasture) White Oak.
Transverse Experiments.

Number of the specimen.	Deflections.			Total weight required to break each piece.	Specific gravity.	Weight reduced to specific gravity 1000.	Weight required to break 1 square inch.
	With the apparatus weighing 390 lbs.	After the weight was removed.	At the crisis of breaking.
	Inches.	Inch.	Inches.	lbs.			lbs.
1	1.650	.150	9.000	836.00	960.0	871.00	209.00
2	1.500	.000	8.500	826.00	988.0	836.00	206.50
3	1.750	.250	9.250	839.00	950.0	883.00	209.75
4	1.750	.100	10.150	882.00	1010.0	873.00	220.50
5	2.350	.350	9.350	744.00	935.0	795.00	186.00
6	2.500	.350	6.750	696.00	1054.0	660.00	174.00
Total	11.500	1.200	53.000	4823.00	5897.0	4918.00	1205.75
Average	1.916	.208	8.833	803.83	982.8	819.66	200.96

Remarks.—Nos. 1, 2, 5, and 6 broke with a splintery fracture, 10 to 12 inches in length 3 and 4, although splintered like the others, were not completely broken asunder.

 

Table XXXIX.
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	$\scriptstyle {\left\{{\begin{matrix}\ \\\\\ \\\ \\\ \ \end{matrix}}\right.}$	988	28,004	7,001
8				960	31,076	7,769
9				935	26,600	6,650
10				1010	31,228	7,807
11				950	23,512	5,878
Total	...			4843	140,420	35, 105
Average	...			969	28,084	7,021