Page:Timber and Timber Trees, Native and Foreign.djvu/129

---

---

Table XLII.
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	$\scriptstyle {\left\{{\begin{matrix}\ \\\\\ \\\ \\\ \ \end{matrix}}\right.}$	758.0	19,600	4,900
8				736.0	19,052	4,763
9				734.0	11,748	2,937
10				738.0	10,920	2,730
Total	...			2966	61,320	15,330
Average	...			741.5	15,330	3,832

 

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

No. 11.	No. 12.	No. 13.	No. 14.	No. 15.	No. 16.	Total.	Average.	Ditto on 1 square inch.
Tons.	Tons.	Tons.	Tons.	Tons.	Tons.	Tons.	Tons.
10.75	10.75	10.5	10.5	10.5	10.125	63.125	10.521	2.630

E = 703230.S = 1897.

THE CANADIAN OAK TREE (Quercus Rubra).

This tree is of perfectly straight growth, and yields the timber of commerce in logs varying from 25 to 50 feet in length by 12 to 24 inches square.

The wood is brown in colour, has a fine straight clean grain, is somewhat porous, shrinks moderately without splitting, is easy to work, and stands well after seasoning. It is remarkable for its very slow growth.

About 4,000 loads of this Canadian Oak timber are usually imported annually into London, and a far greater quantity into the Liverpool market, for the use of cabinet-makers and general dealers, who employ it for