Page:Timber and Timber Trees, Native and Foreign.djvu/177

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Table LXXVII.—Mora (Demerara and Trinidad).
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	2.000	.10	4.75	1,353	1075.00	1258.00	338.25
2	2.000	.10	5.00	1,363	1088.00	1253.00	340.75
3	2.150	.15	5.00	1,304	1094.00	1192.00	326.00
4	2.000	.05	3.00	1,284	1090.00	1178.00	321.00
Total	8.150	.40	1975	5,304	4347.00	4881.00	1326.00
Average	2.037	.10	4.94	1,326	1086.75	1220.25	331.50

Remarks.—Each piece broke with about 12 inches length of fracture.

 

Table LXXVIII.
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.
5	$\scriptstyle {\left.{\begin{matrix}\ \\\\\ \ \end{matrix}}\right\}\,}$	2 × 2 × 30	$\scriptstyle {\left\{{\begin{matrix}\ \\\\\ \ \end{matrix}}\right.}$	1094	37,800	9,450
6				1090	37,240	9,310
7				1075	35,840	8,960
Total		...	3259		110,880	27,720
Average		...	1086		36,960	9,240

 

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

No. 8.	No. 9.	No. 10.	No. 11.	No. 12.	No. 13.	Total.	Average.	Ditto on 1 square inch.
Tons.	Tons.	Tons.	Tons.	Tons.	Tons.	Tons.	Tons.
14.875	14.750	14.875	15.750	15.750	15.500	91.50	15.25	3.812

E = 466570.S = 3481.