ILLUSTRATIONS. 



PAGE 



Giant Hevea Brasilicnsis 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 69 



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



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



per annum 79 



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



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



