188 ECONOMIC BOTANY. 



1871. TANYIN What is the source of the " Tanyin fruit " of the 



Burmese trade lists, and what its uses ? 



MOCHAKAS. This brown astringent substance, which is found 

 in the bazaars of India, is said to be partly derived from 

 Salmalia Malabarica, part is said to be an exudation from the 

 trunk of the Areca palm (Areca catechu). It would be well to 

 ascertain if any astringent substance is exuded, or whether any 

 galls are formed, as some suggest, on Areca catechu. The source 

 or sources of the Mocharas should be determined. 



EAJAH- CANES, exported from Borneo. The species of palm 

 yielding these is unknown. 



What tree affords the so-called Amboyna or Kyabocca wood ? 



GUTTA-PERCHA is, even up to the present day, little known. 

 It is said to be yielded by several plants, such as species of 

 Isonandra, Chrysophyllum, Sideroxylon and others. Attention 

 should be paid to the vernacular names, such as Gutta-percha* 

 Ugiatoputih,Kotian, Tubanoi Taban, etc. Abundant and care- 

 fully preserved wet and dry specimens of the leaves, flowers/and 

 fruits of the different kinds, the products of the same individuals 

 from which the dried specimens are obtained, are greatly needed. 



CAOUTCHOUC, or INDIA-RUBBER. In the Malayan Archipelago 

 there are many trees which yield caoutchouc. Urceola elastica 

 is the source of the Borneo india-rubber. 



What trees produce the so-called Singapore rubber, and the 

 Java, Sumatra, and Siam kinds ? Are they species of Ficus ? 



In Assam Ficus elastica is the chief, if not the only source 

 of india-rubber. But Ficus laccifera may also yield it. Is any 

 india-rubber collected from the latter, and is it kept separate or 

 mixed with that of F. elastica ? Specimens of each, accompanied 

 by good dried specimens, would be valuable. Are there no other 

 trees capable of yielding india-rubber in quantity ? Willuglibeia 

 edulis, the "Luti-am" of Chittagong and Silhet, is said by Eoxburgh 

 to yield good india-rubber. Specimens of the india-rubber, and 

 also carefully-prepared and abundant specimens of the leaves, 

 flowers, and fruit, both dried and in spirit, are much needed. 



