166 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.—Sasicu (CuBA). 
Transverse Experiments. 
Deflections. Total Weight} wei 
ight Oe duced eight 
Number [with the | After the| At _ | required | ‘B.2 |"“to | required 
ob ine apparatus| weight | the crisis | to break A | specific poeta 
specimen. | weighing was of each wt | gravity | 7 ane 
390 Ibs. | removed. | breaking. | piece. 1000, SHEDS 
Inches. Inch. Inches. Ibs. Ibs. 
I 1°00 “00 3°25 1,090 936 | 1165 | 272°50 
2 1'00 "IO. 4°10 1,510 | 928 | 1735 | 377°50 
3 1‘00 05 3°15 1,090 | 899 | 1213 | 272°50 
4 85 "00 4°25 | 1,390 | 910 | 1527 | 347°50 
5 100 *05 3°50 1,280 923 | 1387 | 320°00 
6 "90 “00 4°25 | 1,395 | 904 | 1543 | 348°75 
Total .) 5°75 ‘20 22°50 71755 | 5500 | 8570 | 1938-75 
Average "958 033 3°75 1,292 °5/916°66 |1428°33] 323°125 
Remarks.—Nos. 1, 4, 5, and 6 broke with about xo to 12 inches fracture; 2 and 3 
broke with 8 inches fracture. 
Taste LXXXI. 
Tensile Experiments. 
Number Dimensions C Weight the Direct 
of the ° Specific iece cohesion on 
specimen, the pieces, gravity. broke with. |x square inch, 
Inches. Ibs. lbs. 
7 923 17,360 4,340 
8 904 24,300 6,090 
9 910 22,120 5,530 
10 ARE ASD 936 21,280 5,320 
11 899 20,776 5,194 
12 928 27,496 6,874 
Total. . oa 5500 133,392 33,348 
Average . or 91666 | 22,232 5,558 
