TABLE OF CONTENTS 



CHAPTER IV 



THE PHYSIOLOGY OF LATEX (continued) 

 TAPPING EXPERIMENTS 



Method of experiment. Wound response. Reasons for the increase of 

 yield. Duration of yield. Relation of yield to volume of bark. Origin of 

 latex. Seasonal variation. Effect of climatic conditions. Variation in 

 yield of individual trees. Tapping intervals. Overlapping. Yield at 

 different levels of the trunk. Effect of tapping on the composition of the 

 latex. General remarks on yield. Resting periods. Effect of tapping on 

 the tree. Summary 56 92 



CHAPTER V 



HEVEA. PLANTING OPERATIONS 



Choice of situation and soil. Clearing. Nurseries. Seed selection. 

 Draining, irrigation, roads, etc. Lining and spacing. Holing and planting. 

 Rate of growth. Weeding. Intercrops. Cultivation and manuring. 

 Green manuring. Shade and wind belts. Pruning. Thinning out. 

 Labour. Other expenses. Tools 93 127 



CHAPTER VI 



HARVESTING OPERATIONS 



Incision methods of tapping. Methods in use. Excision methods. 

 Systems of paring. Marking the tree. Tapping. Angle of cut. Direc- 

 tion of cut. Distance between successive cuts. Yields at different levels. 

 Tapping tools. Plantation yields 128 152 



CHAPTER VII 



FACTORY WORK ON THE ESTATE 



The factory. Transport of latex. Coagulation. Washing. Drying. 

 Creping. Smoking. Smoke curing of latex. Blocking. Scrap. Packing. 

 The best form of plantation rubber. Sales and markets. Quality. Defects 

 and blemishes. Tackiness 153 175 



