reached a sufficient thickness for the purpose, and a herring- 

 bone system is then adopted. If care is taken not to wound 

 the cambium the bark heals quickly and well. 



(6) The process of manufacture is simple. No acid is used, 

 but coagulation is done with hot water in a dark room, and 

 the quality of the resulting rubber is improved by slow 

 coagulation. After coagulation the wet rubber is rolled and 

 washed. This variety contains a large amount of resin and 

 washing must be prolonged. It is finally made into sheet, a 

 diamond roller usually being used, and dried. Some smoked 

 sheet is manufactured. In Coorg three factories are equipped 

 to handle the latex from the estates. 



(7) The yield is smaller than from Hevea. An average 

 yield from six-year-old trees is Ib. dry rubber per tree in 

 40 tappings. This can be put on the market at a good profit. 



(8) The Ceara tree is found to be very variable as regards 

 yield of latex and rubber, and new clearings are now being 

 planted with cuttings from selected trees with the idea of 

 improving the yield. 



(9) Manurial experiments are in their infancy, and it is as yet 

 too soon to say anything definite about results. There appears 

 to be a tendency for nitrate of soda and possibly potash salts, 

 applied just before tapping, to increase the latex yield. 



(10) Diseases are few, the most important being a root 

 disease caused by a fungus, but this is controllable by remov- 

 ing jungle stumps before planting, and by digging out and 

 burning affected trees as soon as they are noticed. 



(n) It is not recommended to grow Ceara in preference to 

 Hevea rubber in districts suited to the latter; but in the hill 

 districts, with a rainfall of 70 to 80 inches, where Hevea will 

 not flourish, there is every reason to believe that Ceara will 

 prove a valuable crop, especially in conjunction with coffee. 



THE CULTIVATION OF MAN I HOT GLAZ/OV// IN 

 UGANDA. 



By SAMUFX SIMPSON, B.Sc., 

 Director of Agriculture, Uganda. 



[ABSTRACT.] 



This rubber grows exceedingly well in Uganda, and was 

 largely planted up to two years ago. The average girth is from 

 19 to 20 in. at three years of age and when ready for tapping. 



A large number of experiments in tapping have been carried 

 ii 



