Page:Timber and Timber Trees, Native and Foreign.djvu/114

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Table XXXIV.
Vertical or Crushing Experiments.

Nos.	Dimensions.	Tons.	Tons.	Tons.	Tons.	Tons.	Tons.	Total Tons.	Average Tons.	Ditto on 1 square inch.
11—16	1″ × 1″ × 1″	3.575	3.875	3.625	3.750	3.975	3.875	22.6375	3.7729	3.773
17—22	2″ × 2″ × 2″	13.500	13.250	13.375	13.750	13.8750	13.250	81.0000	13.5000	3.375
23	3″ × 3″ × 3″	28.500	...	...	...	...	...	...	28.5000	3.166
24	4″ × 4″ × 4″	49.00	...	...	...	...	...	...	49.0000	3.062
25—28	2″ × 2″ × 1″ 2″ 3″ 4″	14.125	13.500	14.000	14.250	...	...	55.875	13.9690	3.492

 

Table XXV.
Experiments on specimens of Dantzic Oak.
Nos, 29, 30, and 31, to ascertain the elongation of the fibres in a length of 3 feet, taken under various strains, the dimensions of the pieces being 2 by 2 by 48 inches.

3 Tons

4 Tons

5 Tons

6 Tons

7 Tons

8 Tons

9 Tons

10 Tons

11 Tons

12 Tons

13 Tons

Elongation preceeding rupture

Breaking strain in tons.

Inch.

Inch.

Inch.

Inch.

Inch.

Inch.

Inch.

Inch.

Inch.

Inch.

Inch.

Inch.

1/32

1/16

3/32

2/16

5/32

3/16

7/32

4/16

4/16

...

...

4/16

11.25

1/32

1/16

2/32

2/16

5/32

3/16

7/32

8/16

4/16

4/16

4/16

4/16

13.25

1/32

1/16

2/16

3/16

4/16

...

...

...

...

...

...

4/16

7.50

Mean .0132

.062

.0937

.146

.187

.218

.25

.25

.25

.25

.25

.25

10.666

E=189680.S=1234.