31 
XIIL—WEST AFRICAN RUBBERS. 
[ K.B., 1889, pp. 63-66.] 
The information contained n the Schall correspondence and 
papers in respect to ane s Afric arere may be usefully perused 
in continuation of t medii pu ed in a recent number of 
the Kew Bulletin aan 1888, dE 253) [p. 141] :— 
FOREIGN OFFICE to ROYAL GARDENS, KEW. 
SIR, Foreign Office, 17th June, 1887. 
I AM directed by the Marquis of Salisbury to transmit to 
you herewith certain samples of india-rubber which have been 
obtained from a district under British protection to, the west of 
the Rio del Rey, by “es H. H. Johnston, British Vice-Consul at 
ue inlay be tested, and to report the result to this Department. 
I am, &c., 
(Signed) T. V. LISTER. 
W. T. Thiselton-Dyer, Esq., C.M.G., &c., 
Royal Gardens, Kew. 
Mr. S. W. SILVER, F.L.S., to ROYAL GARDENS, KEW. 
3, York Gate, paper Park, N.W., 
DEAR SIR, 27th J 1887. 
REFERRING to mine of the 29th serum T Msn the pleasure 
io forward a copy of the report from our chemist at Rilveriown, 
with samples showing the results, and pe state that sample 
as a market value of ls. per lb.; No. 3 (dark), ls. 6d. ; a E 
(light), Is. 10d. and 2s. ; No. 5, about 2s. 3d. 
I am, &e., 
(Signed) S. W. SILVER. 
D. Morris, Esq., 
Royal Gardens, Kew. ; 
HaponT of ine INDIA-RUBBER, GUTTA PRORA, AND TELE- 
RAPH WORKS COMPANY, LIMITE 
Silvertown, 21st July, 1887. 
Description, éc.—Four samples ee Pertti ge bod received, 
No. 5. 
marked respectively No. 2, No. 3, No. 3 (dark), an 
e samples marked No. 3 have jn dealt s as duplicate 
sam of the same rubber. Sample No. 2 was black and sticky 
on the outside, due to oxidation ; the freshly-c urfaces w 
slate-grey colour. The rubber was a on-adhesive to the 
on e The samples marked No. 3 differed slightly in appear- 
e was much darker than the ot e er sample 
eéidently would be more prone to decay than the lighter sample, 
