Page:Timber and Timber Trees, Native and Foreign.djvu/109

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XIV.]
SARDINIAN OAK.
89

Table XXX. —Sardinian Oak.
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 2.65 .050 5.75 765 1002.0 763.00 191.25
2 2.75 .10.0 5.65 659 1030.0 639.00 164.75
3 3.15 .15.0 4.85 630 1025.0 614.00 157.50
4 2.25 .15.0 8.00 906 943.0 961.00 226.50
5 2.50 .15.0 8.25 776 973.0 899.00 194.00
6 2.35 .15.0 6.50 812 970.0 838.00 203.00
Total 15.65 .75.0 39.00 4,548 5943.0 4714.00 1137.00
Average 2.608 .125 6.5.0 758 990.5 785.66 189.5.0

Remarks.—Nos. 1, 2 , and 3 broke rather short to 1-5th the depth, and had about 12 inches length of fracture under it. 4, 5, and 6 had 13 inches length of fibrous fracture.

Table XXXI.—Sardinian Oak.
Vertical or Crushing Strain on cubes of 2 inches.
No. 7. No. 8. No. 9. No. 10. No. 11. No. 12. Total. Average.
Tons. Tons. Tons. Tons. Tons. Tons. Tons. Tons.
10.00 10.125 10.625 10.750 10.000 11.000 62.500 10.416
[1]2.50 2.531 2.656 2.687 2.500 2.750 10.416 2.604
  1. On 1 square inch.

E = 363450.S = 1990.