INDEX. 



Soils, Inoculation of, by bacteria, 46 



Moisture in, 45, 47, 50, 130 



Nitrogen in, 45 



Physical condition of, 44 



Potash in, 45 



Salt for, 50 



Sulphur, Effect of, on rubber, 98 



Tackiness, Causes of, in rubber, 134 

 Tapping, Effect of over-, 81 

 .areas, 91 



Best time for, 68, 77, 78 



by pricking, 76, 87 



Herring-bone, 82 



implements, 69 



operations, 68 



renewed bark, 89, 128 



- Spiral, 83 



- Various methods of, 69, 88, 148 



Tapping, V method of, 81 

 Wounds caused by, 81 

 Termites, Destroyer for, 61 

 Tillage, 42 

 Transplanting Hevea, 38 



Vacuum drying, 97, 137 

 Vulcanisation, Effects of, 96 



W 



Washing Machines, 123 

 Weeding, 42 

 Worm rubber, 112, 116 

 Wound response, 66, 75, 78, 89 



Yield of cultivated Para rubber, 15, 27, 

 M5 



Printed at THE DARIEN PRESS, Edinburgh. 



