YIELDS AND RESULTS 23 



was commenced on November 14th, 1908, at 

 Entebbe, when a seven-year-old and a four-year- 

 old tree were operated on. Tapping was con- 

 tinued over a period of 59 days. The yields 

 obtained were, in dry rubber, 4*7 ozs. from the 

 seven-year-old tree, and 4'3 ozs. from the four- 

 year-old tree. It was estimated from the above 

 yields that 1 Ib. of dry rubber, per tree, per annum, 

 could be expected. It should be explained that 

 the seven-year-old tree was the original tree intro- 

 duced from Kew, whereas the other was from a 

 home-grown seedling. Further experiments were 

 made on four-year-old trees, which, for 44 tap- 

 pings over a period of 90 days, yielded 4J ozs. of 

 dry rubber each; and in a later experiment still 

 the same trees yielded 5J ozs. of dry rubber each 

 in a period of 60 days. 



During 1912, also at Entebbe, 164 trees were 

 tapped 41 times over a period of three months. 

 The yield obtained was 13 ozs. of dry rubber per 

 tree. In the report giving these figures the age of 

 the trees is not given ; but presumably they are the 

 trees which were four years old in 1908, and their 

 age at the time of this tapping was eight years. 

 The methods of tapping were varied and expert 



