ILLUSTRATIONS. 



PAGE 



Giant Hevea Brasiliensis at Heneratgoda, Ceylon . . 10 



Para trees : 5^ years old ; 15 feet by 10 feet ; tapped on half- 

 herring-bone system of bark excision . . -25 



Para trees : 25 years old ; 8 feet by 10 feet ; tapped princi- 

 pally by bark incision . . . ... . 35 



Para : vertical tapping system to reduce bark excision and 



increase yield ........ 37 



Pollarded Para tree : showing vigorous shoots and extra- 

 ordinary girth ........ 39 



Young trees decapitated by storm throwing out healthy 



new growths 45 



The Author showing correct way of tapping M. Glaziovii 56 

 An East African plantation : the Mkumbi 57 

 How not to grow Ceara ....... 63 



How not to tap Ceara : effect of bark excision on young 



tree . 7 69 



Ceara tree : 2\ years old ; effect of wrong tapping . . 73 



Ceara tree : 20 years old ; yields 4 Ib. to 5 Ib. of rubber 



per annum . v 79 



Castilloa elastica : yield 4 oz. per tree . . 93 



Castilloa elastica : 7 years old ; yield under 2 oz. per tree . 95 



