Page:Timber and Timber Trees, Native and Foreign.djvu/269

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Table CXXXII.
Vertical or Crushing Experiments.

Number of the specimen.	Length of the sepcimen.	Scantling.		Area in square inches.		Weight			Specfic gravity	Crushed with	Ditto on 1 square inch.
	Inches.	Inches.				lbs.	oz.			Tons.	Tons.
25	1	$\scriptstyle {\left.{\begin{matrix}\ \\\\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \ \end{matrix}}\right\}\,}$	2 × 2	4	$\scriptstyle {\left\{{\begin{matrix}\ \\\\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \ \end{matrix}}\right.}$	0	1		...	9.875	2.469
26	2					0	2		...	8.437	2.109
27	3					0	3	½	...	11.500	2.875
28	4					0	4	½	...	9.000	2.250
29	5					0	7		...	10.500	2.625
30	6					0	8	½	...	11.250	2.812
31	7					0	10		...	11.125	2.781
32	8					0	10	½	...	11.000	2.750
33	9					0	12		...	10.000	2.500
34	10					0	15		...	8.000	2.000
35	11					1	1		...	9.750	2.437
36	12					1	3		...	11.125	2.781
37	18					1	6		...	9.875	2.469
38	24					1	8	½	...	6.875	1.719
39	30					2	5	½	...	7.375	1.844
40	12	$\scriptstyle {\left.{\begin{matrix}\ \\\\\ \\\ \\\ \\\ \ \end{matrix}}\right\}\,}$	9½ × 10½	100	$\scriptstyle {\left\{{\begin{matrix}\ \\\\\ \\\ \\\ \\\ \ \end{matrix}}\right.}$	28	1		647	367.80	3.678
41	15					27	7		506	214.70	2.147
42	18					33	0		507	245.40	2.454
43	21					48	3		634	245.40	2.454
44	18	$\scriptstyle {\left.{\begin{matrix}\ \\\\\ \\\ \ \end{matrix}}\right\}\,}$	10½ × 10½	110.25	$\scriptstyle {\left\{{\begin{matrix}\ \\\\\ \\\ \ \end{matrix}}\right.}$	44	18		646	107.00	2.784
45	21					54	11		654	307.00	2.784
46	24					55	4		577	279.20	2.532
47	27	$\scriptstyle {\left.{\begin{matrix}\ \\\\\ \ \end{matrix}}\right\}\,}$	12x12	144	$\scriptstyle {\left\{{\begin{matrix}\ \\\\\ \ \end{matrix}}\right.}$	85	0		604	378.72	2.630
48	30					92	6		593	396.28	2.752

E = 752420.S = 1575.

The Riga is of slower growth than the Dantzic Fir, the difference being about 0.4 layers per inch in diameter (vide Table II.); this, in view of the theory previously set up, indicates that it is inferior to the Dantzic Fir. Contracts for the supply of Riga Fir timber, and hand-masts for the royal navy, are made annually; the quantities of each kind varying according to the requirements of the several dockyards. They are received under the following specification and conditions, viz., the timber at per load of 50 cubic feet, and the hand-masts at each.