Page:Timber and Timber Trees, Native and Foreign.djvu/108

From Wikisource
Jump to navigation Jump to search
This page has been proofread, but needs to be validated.
88
TIMBER AND TIMBER TREES.
[CHAP.
Table XXVIII.—Italian or Tuscan 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 9.75 9.500 9.750 10.00 9.500 58.50 9.750
[1]2.50 2.437 2.375 2.437 2.50 2.375 9.75 2.437
  1. ↑ On 1 square inch.

E = 248950.S = 1989.

Table XXIX.— Italian or Modena 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 2.25 .050 5.650 848.00 1130.0 750.0 212.00
2 2.30 .050 6.700 787.00 1103.0 713.0 196.75
3 2.25 .050 6.150 881.00 1121.0 786.0 220.25
4 270 .150 7.000 823.00 1060.0 776.0 205.75
5 2.25 .100 6.250 859.00 1092.0 787.0 214.75
6 2.25 .050 6.000 859.00 1150.0 747.0 214.75
Total 14.00 .450 37.75 5057.00 6656.0 4559.0 1264.25
Average 2.33 .075 6.291 842.83 1109.3 7598.3 210.71

Remarks.—Nos. 1, 5, and 6 broke with fractures slightly scarf-shaped ; 2, 3, and 4 had long fibrous fractures.

E = 400420.S = 2212.

Retrieved from "https://en.wikisource.org/w/index.php?title=Page:Timber_and_Timber_Trees,_Native_and_Foreign.djvu/108&oldid=9366326"