Some of the Constructional Woods of British Guiana. 57 



Futui (or Photeej. 

 Middle 

 Specimen. — Weight per cub. ft. 242 lbs. lbs. per sq. inch 



Modulus of rupture 6,559 



Do. of Elasticity 1,444,727 



Breaking weight 32-4 cwt. 



Description. 

 Resembles while pine, planes well but turns badly. 

 Price per 1,000 feet B.M. f.o.b. Georgetown.— 



Greenheart (Nectandra Rodioei). 

 Lower 

 Specimen — Weight per cub. It. 684 lbs. lbs. per sq. inch 



Modulus of rupture 22,680 



Do. of Elasticity 3,840,000 



Breaking weight 1125 cwt. 



Description. 

 Rated first class at Lloyds, said to be the best timber for 

 resisting tensile and compressive strains. Resists Limnora 

 terebrans and Teredo and ranks next to teak in resisting white 

 ants, world-wide reputation for submerged work of all kinds. 

 Can be bad up to 24 inches square x 70 feet long. 

 Price per 1,000 Ft. B.M. f.o.b. Georgetown.— 



Plate 2. 



White Silverballi (Nectandra sp.) 

 Upper 

 Specimen — Weight per cub. ft. 36 28 lbs. lbs. per sq. inch 



Modulus of rupture 10,566 



Do. of Elasticity 1,9*9,125 



Breaking weight 5'24 cwt. 



Description. 



Uniform greenish or yellowish color, surface lustrous brilliant 

 and satiny, suitable for inside wall boarding. Logs procurable 

 up to 30 ft. x 8-9 inches. 

 Price per 1,000' feet B.M. f.o.b. Georgetown. — 



Win hint. 

 Middle 

 Specimen — Weight per cub. ft. 5317 lbs. bs per sq. inch 



Modulus of rupture 18,150 



Do. of Elasticity ,865,166 



Breaking weight 900 cwt. 



Description. 



Price per 1,000 feet B.M. f.o.b, Georgetown.— 



