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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 % lb. 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. 
(11) 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/HOT GLAZ/OVI/ IN 
UGANDA. 
By SAMUEL 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 
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