Page:Timber and Timber Trees, Native and Foreign.djvu/241

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Table CXV.
Tensile Experiments.

Number of the specimen.	Dimensions of the pieces.			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	$\scriptstyle {\left\{{\begin{matrix}\ \\\\\ \\\ \ \end{matrix}}\right.}$	690	21,060	5040
8				625	26,880	6,720
9				611	18,480	4,620
Total.	...			1926	66,420	16,380
Average	...			642	22,140	5,460

 

Table CXVI.
Vertical or Crushing Strain on cubes of 2 inches.

No. 10.	No. 11.	No. 12.	No. 13.	No. 14.	No. 15.	Total.	Average.	Ditto on 1 square inch.
Tons.	Tons.	Tons.	Tons.	Tons.	Tons.	Tons.	Tons.
10.25	10.00	10.75	10.50	10.25	10.375	62.00	10.333	2.583

E = 250820.S = 1032.

Contracts are annually made for the supply of English Elm timber for the royal navy, according to the following specification and conditions, the quantities of the several classes, and the quantity required for each of the dockyards, of course varying from year to year, to suit the works in hand.