204 TIMEHRI. 
) 
RESISTANCE TO CRUSHING. 
Dimensions. Area | Crush- |Cr’hing 
No. of Inches. of ing |str’gth. 
Specimen Name. Locality. Section.| Load. — 
Section. |Height.| Sq.in,| Tons. |sq. in. 
73.¢ {Mora | Br, Guiana. |3:219 x 3:272} 813 | 10:53 | 331 | 3°143 
75 ¢ Locust +s 2°998 x 3°078; 8°13 9°23 49°9 5°408 
76¢ Simarupa... ta 2°986 x 2°980| 8°16 8°95 15°89 | 1°785 
77 c Hackia x 3119 x 2°873) 8°15 8°90 43°50 4°854 
qc Crabwood... > 3°065 x 2-544! 8°05 7°80 25°71 3°297 
9 e¢ Euriballi ... =m 2°99. x 2°989) 8°05 8°94 36°10 4°038 
73 e.—Broke by shearing. 
75 c.—Broke by shearing, 
76 c.—Broke by shearing. 
ee OE ESS SEE EL STR ET TS AD A NTS AR TR ARTE 
Specimen Name. 
73 e. |\Mora 
75 e. |\Locust 
15 f. " 
76 e. |Simarupa... 
76 d. % 
Tie Hackia ... 
lid 99 
78 € Crabwood... 
719 @ Euriballi ... 
79 d = 
77 c.—Broke by shearing. 
78 c.—Broke by shearing. 
79 c.—Broke by vertical splitting. 
RESISTANCE TO SHEARING. 
_|Ultimate Shear- 
Shear : 
Dimensions- aie 4 in ing Stress, 
- eared! Load. 
Locality. Inches. : Pounds | Tons 
Sq-in. |Pounds,| per per 
sq. in. | sq, in. 
.| Br, Guiana, | 2°00 x 2°00 4°00 4,084 | 1,021°0 | 0°456 
a 2°00 x 2°06 4°11 5,287 | 1,285°2 0°574 
Of 2°01 x 1°98 3°98 3,618 908°6 0°406 
a 1°98 x 1°98 3°90 1,675 429°1 0°192 
% 1°93 x 2°00 3°86 2,218 575°2 0'257 
%9 2°02 x 2°00 4°03 3,510 857°8 0'383 
ce 2°10 x 2°91 4°23 5,025 | 1,188°2 0°531 
rs 2°01 x 1°97 3°96 3,835 967°7 0°433 
” 1°99 x 1°92 3°82 4,350 | 1,138°3 0°509 
” 2:03 x 2°03 4°11 3,190 776°9 0347 
73 e.—Shearing plane nearly at right angles to annual rings. Regular fracture. 
75 f.—Across annual rings. 
75 e.—Parallel to rings. 
76 e.—Parallel to rings. 
76 d.—Across rings. 
77 e.—Parallel to rings. 
77 d,—Across rings. 
78 e,—Parallel to rings. 
79 e.—Parallel to rings. 
79 d.—Across rings. 
Irregular fracture. 
Regular fracture. 
Smooth fracture. 
Regular fratture. 
Regular fracture. 
Irregular fracture, 
Regular fracture. 
Regular fracture. 
Regular fracture, 
