Page:Timber and Timber Trees, Native and Foreign.djvu/283

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XXXI.]
LARCHES.
263

Table CXL.
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 6l8 14,000 3,500
8 645 13,440 3,360
9 647 19,936 4,984
10 688 19,880 4,970
Total ... 2598 67,256 16,814
Average . ... 649 16,814 4,203
Table CXLI.
Vertical Experiments 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.
11—14 2.875 10.750 19.625 42.750
15—18 2.750 10.875 19.500 42.500
19, 20 2.875 10.750
21, 22 3.000 10.375
Total 11.500 42.750 39.125 85.250
Average . 2.875 10.687 19.562 42.620
Do. per in. 2.875 2.672 2.174 2.663

E = 649130.S=1643.

North America also produces a species of Larch, the well-known Hackmatack (Larix Americana); it is said to be tolerably abundant, and is found to range from the mountains of Virginia to Hudson's Bay.

In deep forests it sometimes attains a height of 60 and