Page:Timber and Timber Trees, Native and Foreign.djvu/248

From Wikisource
Jump to navigation Jump to search
This page has been proofread, but needs to be validated.

228
TIMBER AND TIMBER TREES.
[CHAP.

Table CXVIII.
Tensile Experiments.
Number
of the
specimen.
Dimensions
of
each piece.
Specific
gravity.
Weight the
piece broke
with.
Direct
cohesion on
1 square inch.
  Inches.   lbs. lbs.
7 2 × 2 × 30 740 32,480 8,120
8 738 31,920 7,980
9 765 42,000 10,500
10 753 38,640 9,660
11 735 33,040 8,260
12 760 42,280 10,570
Total. ... 4491 220,360 55,090
Average . ... 748 36,727 9,l82
Table CXIX.
Vertical or Crushing Strain on cubes of—
Number
of the
specimens.
1 Inch. 2 Inches. 3 Inches. 4 Inches.
Crushed with Crushed with Crushed with Crushed with
  Tons. Tons. Tons. Tons.
13–16 3.000 15.75 37.125 62.500
17–20 3.125 16.25 36.625 61.000
21, 22 3.500 17.00
23, 24 3.625 16.00
Total 13.250 65.00 73.750 123.5.00
Average 3.312 16.25 36.875 61.750
Do. per in. 3.312 4.062 4.097 3.859

E = 618550.S = 2415.