XXxI. | LARCHES. 263 
TABLE CXL. 
“Tensile Experiments. 
Number . . . Weight the Direct 
D f Specifi 7 ‘ 
specimen, | tach piece. | gravity. | PHCGS broke |, cohesion om 
Inches. Ibs. Ibs. 
2 618 14,000 3,500 
645 13,440 | 3,360 
9 2x2%3° |) 647 | 19,936 | 4,984 
Io 688 19,880 4,970 
Total. sis 2598 67,256 16,814 
Average . as 649 16,814 4,203 
TABLE CXLI. 
Vertical Experiments on Cubes of 
Number 1 Inch. 2 Inches, 3 Inches. 4 Inches. 
of the 
specimens. {Crushed with | Crushed with | Crushed with| Crushedwith 
Tons. Tons. Tons. _ Tons. 
1I—14 2°875 10°750 19°625 42°75 
15—18 2°750 10°875 19°500 42°50 
19, 20 2°875 10°750 —_— — 
21, 22 3°000 10°375 — _ 
Total. .| 11°5 42°75 39°125 85°25 
Average.| 2°875 10°687 19°562 42°62 
Do. perin.| 27875 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 
' 
f 
