PARA RUBBER. 



15 



coffee is interplanted with Para rubber. In South India various 

 species of rubber-yielding plants are being tried at high elevations, 

 in conjunction with tea and coffee. The illustration, Series B, 

 Plate 2, shows Para rubber and coffee both doing well at a high 

 elevation, and the results of tapping on an estate in the 

 Shevaroy Hills are given in the chapter dealing with yields. It is 

 as well to bear in mind that the elevation up to 3,500 feet in so far 

 that it is affected with changes of atmospheric pressure has very 

 little influence on the growth of the rubber : far more important are 

 the questions of ranges of temperature and rainfall. 



Africa, West Indies, Borneo, &c. 



The illustrations given elsewhere will show under what con- 

 ditions Para rubber is being grown in Ceylon and other parts of the 

 tropical world, for in addition to alluvial flats and gentle slopes, 

 rocky hillsides and well-drained swampy land have been proved to 

 be suitable for this product. 



In the Gold Coast, West Africa, it is according to Johnson, being 

 grown at an elevation of 1,500 feet above sea-level, where the 

 average mean temperature is about 81 -5 F. and the annual average 

 rainfall only 47 inches, and there promises to do better than 

 other rubber-producing plants, indigenous or exotic. 



The following table shows the rainfall and number of days on 

 which rain fell during 1900-1904, at Aburi-Gold Coast :— 



(Annual Report for 1904 by Director, Botanic Department, 

 Gold Coast.) 



