INDEX. 



Acid, Acetic, 101, 114, 129 



action on latex, 129, 130 



Citric, 46, 101 



Coagulating effect of, 129 



- Formic, 133, 134 



- Hydrochloric, 101 



Oxalic, 101 



Phosphoric, 45, 46, 49 



Sulphuric, 101 



- Tartaric, 101 



Age of trees, Effect of, upon rubber, 68 



Albuminous matter (vide Proteids), 96 



Alkaline coagulants, 101 



Alkalinity of latex, 66 



Analyses, 45, 64, 108, 120, 170, 171, 172 



Antiseptics, 130 



Ants, white, Destruction of, 60 



white, Ravages of, 60 

 Areas planted with rubber, 4, 14 



B 



Bamboo pots for seedlings, 29 

 Bark shavings, 72, 83 



- Tapping of renewed, 89, 12 



- Thickness of, 74 

 Baskets for seedlings, 30 

 Between-crops, 39 

 Biscuits, Rubber, 3, 102, 107 

 Blocking rubber, 116 



Calcium chloride, 137 

 Cambium tissue, 76 



Canker of Hevea, 54 

 Caoutchouc globules, 66, 129, 130 



Percentage of, in latex, 65 

 Carbon di-sulphide for white ants, 60 



di-oxide, 48 

 Cassava, 41 

 Catch crops, 39 



Chemical analyses, 64, 108, 120 



Chillies, 41 



Climatic conditions in Africa, 22 



conditions in Ceylon, 21 



conditions in Malay Peninsula, 22 

 Coagulants, 101, 106 

 Coagulating machine, 109 



Cocoa, 39 

 Coffee, 39, 40 

 Collecting vessels, 89 

 Cortex, 56, 89 

 Cotton, 40 



Creosoting latex, 129, 130 

 Crepe rubber, 113, 114 

 Crops, Leguminous, 49 

 Cultivation, 32 



Disbudding, 43 

 Disease-checking belts, 51 



Fungus, 52 



Insect, 59 

 - Leaf, 58 



Root, 57 



Stem, 56 



Treatment of, 54, 61 

 Drainage, 43 



Drying rubber, 108, 112, 136 



rubber, Artificial heat for, 102, 108 



