i66 
TIMBER AND TIMBER TREES. 
[chap. 
Officers have, however, hesitated to employ it for beams 
which are intended to carry heavy guns, lest it should 
contain some hidden defect of the character just 
mentioned. It is only sparingly used in works of civil 
architecture, on account of its great specific gravity. 
Table LXXX.— Sabicu (Cuba). 
Transverse Experiments. 
Deflections. 
Total 
weight 
required 
to break 
each 
piece. 
Weight 
reduced 
to 
specific 
gravity 
1000. 
Weight 
Number 
of the 
specimen. 
With the 
apparatus 
weighing 
390 ibs. 
After the 
weight 
was 
removed. 
At 
the crisis 
of 
breaking. 
! Specifii 
gravity 
required 
to break 
x square 
inch. 
I 
Inches. 
I 'OO 
Inch. 
'OO 
Inches. 
3' 2 5 
lbs. 
1,090 
936 
H65 
lbs. 
272-50 
2 
I 'OO 
•IO 
4 'IO 
1,510 
928 
1735 
37770 
3 
I 'OO 
•05 
3*15 
1,090 
899 
1213 
272-50 
4 
•85 
•00 
4'25 
1,390 
1,280 
910 
1527 
34770 
5 
1 - oo 
•05 
3 ' 5 ° 
923 
1387 
320 'OO 
6 
•90 
•00 
4-25 
T 395 
904 
1543 
348-75 
Total . 
575 
•20 
22-50 
7,755 
5500 
8570 
1938-75 
Average 
•958 
•033 
375 
1,292-5 
916‘66 
I428-33 
323-125 
Remarks. —Nos. i, 4, 5, and 6 broke with about 10 to 11 inches fracture ; 2 and 3 
broke with 8 inches fracture. 
Table LXXXI. 
Tensile Experiments. 
Number 
of the 
specimen. 
Dimensions 
of 
the pieces. 
Specific 
gravity. 
Weight the 
piece 
broke with. 
Direct 
cohesion on 
1 square inch. 
7 
8 
9 
10 
11 
12 
Inches. 
\ / 
2 X 2 X 30 / 
! 
923 
904 
910 
936 
899 
928 
lbs. 
17.360 
24.360 
22,120 
21,280 
20,776 
27,496 
lbs. 
4,340 
6,090 
5,530 
5,320 
5794 
6,874 
Total. . 
5500 
133,392 
33,348 
Average . 
916 - 66 
22,232 
5,558 
