CONTENTS ix 



CHAP. PAGE 



XXV. DRYING RUBBER 203 



Preliminary Dripping Drying-houses : Circulation of 

 Air, Details of Construction. Sizes and Costs Specifica- 

 tions and Costs of two Drying-houses Drying with Hot 

 Air Oil-fuel Driers Vacuum Driers. 



XXVI. SMOKING RUBBER 209 



Coagulation by Smoking in Brazil Antiseptic Action of 

 Smoke Eastern Methods of Coagulation Adoption of 

 Surface-smoking Antiseptic Treatment of Fermentable 

 Matters rather than their Removal Preference of Manu- 

 facturers for Smoked Rubber Smoked Sheet with 

 Diamond-pattern Ridges And Name of Estate More 

 First-quality Rubber got with Smoked Sheet Its High 

 Quality Smoking-houses, their Structure Making the 

 Smoke Fire Dangers Costs of Preparing Rubber 

 Relative Loss to Manufacturers with Plantation and 

 Brazilian Rubber Smoking will enable Plantation 

 Rubber to hold its own Enormous Gain to Plantation 

 Industry through Increase in Price Future of Brazilian 

 Rubber. 



XXVII. PACKING AND PACKING-CASES . . . .216 



Cases made on Estate Patent Cases Importance of 

 Lightness Packing and Banding Desirability of effi- 

 ciently Sorting Rubber Marking of Cases Insurance. 



XXVIII. COST OF PRODUCING RUBBER . . . .218 



Distribution of Costs between Revenue and Capital 

 Accounts Desirability of Standard Method of Charging 

 Cost Costs Compared in Ceylon, F.M.S., Sumatra, etc. 

 Future Changes in Costs. 



XXIX. WATER SUPPLY 220 



Purity important from point of view of Health and of 

 Manufacture Filter-beds Filter-presses Wells and 

 their Management. 



XXX. WEEDING AND CULTIVATION . . . . .222 



Lalang, its Removal Three-weekly System of Weed- 

 ing Costs of Weeding in Ceylon, Sumatra and F.M.S. 

 Disc Ploughs and Cultivators Shallowness of Ploughing 

 Costs with Cultivators Circle-weeding and Costs 

 Light Grasses and Weeds on Slopes to prevent Wash 

 Clean-weeding now less held to Weed Coverings on 

 Flat Land objectionable, though not on Steep Land 

 Terracing Cultivation makes Soil more Pervious and 

 Retentive of Water And increases Amount of Plant- 

 food Alma Baker and Three-monthly Chankolling^- 

 Root-pruning Tillage of Clay Soils, Advantages Im- 

 proved Yields after Chankolling. 



XXXI. WEED COVERINGS .231 



Passiflora and its Disadvantages Hindrance to Growth 

 by Kratok Crotalaria Mimosa Ploughing it in 

 Method of its Control Indigo as Cover and Catch- 

 crop Question of desirability of Weed Coverings. 



XXXII. WASH OF SOIL .236 



Serious Losses of Surface-soil by Wash Prevention by 

 Hedges of Lamtora or Clitoria Water-pits and Cost of 

 Clearing Terracing Belts of Guinea Grass. 



