INDEX 



Acetic acid Action of 



Advantages of 



Amount required 



Method of determining amount required 



Disadvantages of 



Execs-; of 



Acids, Action on rubber of 



Advantages and disadvantages of 



Effect on coagulation of 



Acreage in rubber 



Age of trees, Effect on rubber of . . 



Importance of 



of trees and resins, Variation of 



when first tapped 



Albizzia moluccana 



Composition of 



Lopping of 



Nature of 



Albuminoids (see Proteids) 

 Alkalies Effect on rubber of 

 Ammonia, ,, 



Use of 



Antiseptics, Use of . . .. _. 



Disadvantages o£ 



and smoking processes 



Arachis hypogeae 



Chemical composition of 



■ Organic matter from 



Ash in latex 



in rubber 



Constituents of 



Bacteria on prepared rubber 

 Bark, Incision of . . 



Excision of 



— — renewal 



■ thickness 



Biffen's centrifugal machine 

 Biscuit rubber, Analysis of 



Preparation of 



Bromine, Effect on rubber of 



