























useum No. 1, contains specimens of these rubbers. 
issam rubber is the produce of Ficus elastica, a large tree of the 
"tocarpec tribe of tcacee. The imports of Assam and Rangoon 
i oe bber (also from F. elastica) amounted to 350 tons in 1891. Specimens 
' be seen in Case 99, Museum No. 1 ES 
orneo rubber is afforded by species af Willughbeia and Leuconotis, : 
“fied genera of the natural order Apocynacee (see Kew Report, 1880, 
); 200 tons of this rubber were imported i into this country ‘turing 
Samples will b» found in Case 71, Museum 
; ican rubber is furnished by several species of the SES Lan- re 
dolphia. woody climbers of the natural order Apocynacee. The best —— - 
quality from the Zanzibar coast is derived from L. Kirkii; two other | 
Species, viz., TA florida (the chief source of Mozambique rubber), and 
Gi ete rsiana are also | sources of the East African supply. raa 
wariensis, which has a very wide bem es’ 
i bbers 
Es 

i c 
part of the West African supply. Liberian rubber is perhaps in part 
orded by the “Abba” tree (Ficus Vogelii), of the Artocarpee 
of races, and bas already been fully discussed in the Kew 
i 
0. 
t, Levis, and Kahn giros the following statistics con- 
eoming these perd rs for 1891, viz. :—African imports, 4,350 tons ; 
Mozambique 380 tons; Madagascar, 300 tons. Case 71, Museum 
, contains samples of these rubbers. 


e nis review. of. ii sources of rubber supply from the com- 
cial side has appeared in The India Rubber and Gutta Percha an nd 
ctrical Trades Journal, January 8, 1892 :— f 
There are merchantable in New York between 30 and 40 different — 
sorts of india-rubber, the variations vate ie the selection by manu- 
facturers in the purchase of stocks, says I. A. Sherman in the Jndia- 
ubber World. Of course, rubber m all its variations is a 
the same, differing somewhat in the same degree as the pumpkin in 
3 one Dakota from, that in New England—one large and a 

qned red in gues 3 she: sap. M iE hat the 
Fe the Amazon Valley have always taken pains in the curing 
While elit matic conditions in that country may Mave ded 
eter of “ Para," the sondino: ich 
bee i takin 





ink ing as ik ow as 10 cents per pound, and not 
m, a par long mical. solu 
denh he rubber | as: apt the proce acess ss being that e the a an 
> th ie chemicals, ing the 







