232 MOZAMBIQUE 



Distance apart : In rich soil 12 by 12, other- 

 wise 10 by 10 feet. 



Age of trees when they stop giving latex : Not 

 known ; some say 17 to 20 years, others much 

 less. They sometimes die, especially if attacked 

 by white ants, at 7 or 8 years. 



Cost per acre to plant and cultivate to 3 years 

 old : If properly managed and economically 

 worked this should not be more than £14 per 

 acre, including clearing the land. 



Value of full bearing plantations, say over 3 years 

 old: Is. or Is. 4d. (1 rupee) per tree in good land. 



Average yield per tree : Varies ; 6 oz. per tree ; 

 3 to 5 trees to 1 lb. of dry rubber; from 50 to 

 90 lb. of dry rubber per acre. 



Task of men tapping : This depends on the age 

 of the trees, and varies in different plantations 

 from I lb. to 2 lb. per day. 



Task of one man hoeing: 800 to 1,000 square 

 yards pei- diem. 



Coagulants : If limes are procurable in large 

 quantities and cheap, say 10 to 20 cents per 

 cwt., they are the best and cheapest coagulant. 

 Dr. Zimmermann's mixture : — 



Per Cent. 



2J litres carbolic acid 0-04 



IJ litre acetic acid ... 0*25 



600 litres water 9971 



10000 



