Page:Timber and Timber Trees, Native and Foreign.djvu/276

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Table CXXXV.—Spruce (Canada).
Transverse Experiments.

Number of the specimen.	Deflections.			Total weight required to break each piece.	Specific gravity.	Weight reduced to specific gravity 600.	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	1.250	.060	6.250	696	451	926	112.75
2	1.200	.050	5.000	719	485	890	121.25
3	1.150	.040	3.750	556	510	654	127.50
4	1.300	.070	5.750	709	490	867	122.50
Total .	4900	.220	20.750	2680	1936	3337	484.00
Average	1.225	.055	5.187	670	484	834	121.00

Remarks.— No. 1 broke with about 12 inches length of fracture ; 2, 3, and 4 with only a little less.

 

Table CXXXVI.
Tensile Experiments.
(Dimensions of each piece, 2 × 2 × 3 inches, s.g. 484.)

——	No. 5.	No. 6.	No. 7.	No. 8.	Total.	Average.
	lbs.	lbs.	lbs.	lbs.	lbs.	lbs.
Weight the piece broke with	13,104	19,040	13,440	17,360	62,944	15,736
Direct cohesion on 1 square inch	3,276	4,760	3,360	4,340	15,736	3,934

 

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

No. 9.	No. 10	No. 11.	No. 12	No. 13.	No. 14.	Total.	Average.	Ditto on 1 sqaure inch.
Tons.	Tons.	Tons.	Tons.	Tons.	Tons.	Tons.	Tons.
9.00	8.875	7.75	8.875	8.75	8.75	52.00	8.666	2.166

E = 771800.S = 1759.