206 TIMEHRI. 
Co. EFFICIENCY OF ELASTICITY FROM BENDING TESTS. 
: Range of Elastic Co-efficient of 
s s Stress, Deflection. Elasticity. 
os Name, Pounds per NT Sy 
. é sq. in. Inches. Pounds per | Tons per 
. sq. in. sq. in, 
73 a | Mora 0 to 6880 0°323 2,432,300 1,085°8 
73 6 is) sone 0 to 6381 0°300 2,353,300 1,050°6 
75 @ | Locust «| 0 to 6344 6°306 2,280,000 1,018°0 
76 a |S8imarupa ... «| O to 6688 0°564 1,353,500 604°3 
76 5 % | 0 to 3204 0°468 765,280 341°7 
77 @ | Hackia 0 to 6455 0°288 2,483,700 1,104°9 
17 6 99 0 3 
to 5431 0°285 2,117,300 945 
Government Secretary’s Office, 
Georgetown, Demerara, 
12th May, 1897. 
I have the honour by direction of the Governor to inform you that 
the Secretary of the Imperial Institute has forwarded a list of timbers, 
a copy of which is enclosed, which remain on hand of those which were 
forwarded to the Institute by Mr. J. J. Quelch, for examination in 
1895, and Sir F. Abel has enquired whether it is desired that all of 
these, or if not, which of them, should be submitted to examination as 
in the case of those already reported on. 
His Excellency will be glad to know whether the Royal Agricultural 
and Commercial Society wish to have the remaining samples, or any 
portion of them, tested, The cost will be borne by the colony. 
I have, &c., 
CHARLES T, COX. 
The Honorary Secretary, 
Royal Agricultural and Commercial Society. 
Purple Heart... nee «-Copaifera bracteata, 
Kretti bes ove sed 
Washiba ons eve Ses 
Bullet Tree ... “hie «-Mimusops ballata, 
Brown Cirouballi oe ...Vectandra sp. 
Suradanni... in 
Arisowroo... ove ... Vatairea guianensis, 
Monkey Pot ... ea . Lecythis grandifiora, 
Yellow Cirouballi ove «..Nectandra Pisi. 
Towaronero ... aes ---Humirium floribundum, 
