198 TIMEHRI. 
-Density Tgsts.—The following Table gives the results of the density 
tests on the specimens prepared for compression :— 
TABLE I.—HEAVINESS. 
Volume 
é . Weight 
No, of * Weight | of Water | Specific * 
Specimen. Mane. Locality. | of Wood. . Dis- | Gravity. |P", bebe 
placed. x 
Grammes| C.C, Lb. 
70 Greenheart ,..| Br. Guiana | 1,459°3 1,190°3 1°226 76°54 
71 Souari...  ... x 1,311°1 | 1,180°6 1111 69°36 
72 Cirouballi . ... re 809°8 1,170°9 0°692 41°18 
74 Kabucalli... = 1,429°0 1,198°5 1°192 74°43 
SHEARING TeEstTs.—Shearing specimens were prepared so that the 
shearing plane was along the fibres, sometimes being parallel and 
sometimes perpendicular to the annual rings, or, at least, as nearly so as 
the plank permitted, 
TABLE II,—RESISTANCE TO SHEARING, 
70 6 (1) x2 
70 6 (2) x2 
71 d (8) x2 
71 @e (4) x 2°00 
72. b (5) x 1°94 
72 b(6) x 1°94 
74 a (7) x 2°00 
74 ¢(8) x 1°95 
(1) Parallel to annual rings. Plane fracture. 
(2) Perpendicular to annual rings. Rather irregular fracture. 
(3) Parallel to annual rings. Rather irregular fracture, 
(4) Perpendicular to annual rings, Irregular fracture. 
(5) Parallel to annual rings. Plane fracture, 
(6) Perpendicular to annual rings. Rather irregular fracture, 
(7) Paraflel to annual rings, Rather irregular fracture. 
(8) Perpendicular to annual rings, Very irregular fracture, 
