263 
£11,739,834). Under Foreign Countries: Dutch East Indies, 
Du toh Guiana, German West and East Africa, French West 
Africa, Somahland, Madagascar, Portuguese West and East 
Africa, Congo, Liberia, Mexico, Colombia, Venezuela, Ecuador, 
Peru, Chile, Brazil, Ur uguay; Bolivia, Argentine Republic, &e. 
(from whence, in 1913, came 797,649 centals, value £8,784,185). 
The total amount from all sources in 1913 is therefore 1, 574, 439 
centals, value £20,524,019; and in 1915 1,825,659 centals, value 
£20,225,060 were imported, the figures for this year showin 
that the British Possessions supply the greater quantity of rubber 
to the Home country. 
Gutta-Percha (Palaquium Gutta, Burck., &e.). 
Britiso.—Malaya. Forrran.—Java, Sumatra. 
Native of Malaya; cultivated in the Straits Settlements and 
ava. Distributed to many British Colonies in the Tropics from 
ew. 
Pontianak Gutta (Dyera costulata, Hook.f.), from Malaya and 
Borneo. 
Balata (Mimusops bidentata, DC.). 
Britisnh.—Guiana. Forricn.—Venezuela, Dutch Guiana. 
This is the chief forest product of British Guiana. The latex 
is sometimes adulterated with that of ‘‘ Touckpong’’ . Rubber 
(Sapium Jenmani), and the imports appear to be entered as 
‘‘ Gutta-Percha,’’ the total from all sources being given in 1915 
as 75,894 cwt., value £668,431. In 1913, 111,240 ewt., value 
£1, 370 ,658, were imported into the United Kingdom. 
Further particulars of all the above rubbers are given in Kew 
Bulletin, Additional Series vii., ‘* Rubber,’’? 1906, or in sub- 
sequent issues of the Bulletin. See also Colonial Reports, 
Miscellaneous, No. 82, 1912, ‘‘ Selected Da from the Scien- 
tific and Technical Dept. Imp. Institute: “‘ Rubber and Gutta- 
Percha,’’ pp. 1-447: ae Cultivation in Togoland and 
Gennan East Africa, A.B., , p. 97. 
The following have been eel in the Kew Bulletin : — 
‘* New Rubber-Containing Plants,’’ 1908, p. 199. 
‘© A New Rubber Plant (Asclepias stellifera)’’, 1909, p. 345, 
from the Transvaal, sample from the root valued by 
Messrs. Hecht, Levis & Kahn for Kew (14. iv. 09) at about 
4/6 per lb. 
“Reanda Rubber (Raphionacme utilis),’’ 1908, p. 209; p. 
305. Tubers from Benguela and details of fants sent to 
Kew by the Companhia de Matin, examined in the 
Jodrell Laboratory at Kew 
“*A New Rubber Tree: Palo Amarillo (Huphorbia fulva),”’ 
1907, p. 294, and 1909, p. 392. 
** Nandi Rubber andelphia sponds) ” 1910, p. 304, 
a first-rate rubber from Uganda, the vine found growing 
at an altitude of 4000 ft. 
