286 THE RUBBER INDUSTRY 



For young trees these results are fairly satisfactory. 

 In several of the records tapping had taken place only 

 for two, three, or four months, and the yield per 

 year is calculated on the monthly returns. These 

 estates were planted with 150 trees to the acre, and 

 on nearly all catch crops of coffee were under cultiva- 

 tion. 



Costs of production f.o.b. Batavia, Soerabaja, or other 

 Java ports, are comparatively high ; no export duty is 

 payable on rubber, and no Government requirements 

 are enacted in regard to accommodation for coolies or 

 extraordinary expenditure in connection with hospitals 

 or medical attendance. The books of various plan- 

 tations show what should be the average cost of pro- 

 ducing a pound of rubber during the next few years, 

 and this information itemized gives the following 

 figures : 



Cents per Lb. 



1. Tapping and collecting (including 50 per cent. 



depreciation on cups and implements) ... 42 



2. Curing and preparation (including 20 per cent. 



depreciation on factory and machinery) ... 4 



3. Transport and shipping 2 



4. Management (exclusive of commissions to 



managers and assistants) 4 



5. Weeding 2 



6. Cultivation 3 



7. Manuring 3 



8. Maintenance of roads and drains 2 



9. Depreciation on building other than factory 



(20 per cent.) 2 



10. Hospital expenses 2 



11. Contingencies (including rent and taxes) ... 4 



Total 70 



