186 



The Supplement to the Tropical Agriculturist 



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XX 189 



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drops all its pseudo-branches (luring a short 

 period ; while in districts where the spring 

 weather is damp the change of foliage is gradual. 

 The fact that the tree may thus stand naked 

 for some time forms the principal objection to 

 its usefulness as a shade for cacao, whilst the 

 abundance of mulch formed by its leaves is a 

 point in favour of its planting. 



"On fertile cultivated land Castitloa is a sur- 

 face feeder, and develops very heavy roots, 

 which run far, without however forming a 

 dense system, as is the case with Hevea. 

 When manure is dug down for the benefit of 

 the cacao trees, the roots of both cacao and 

 rubber develop equally well in it, very differ- 

 ently from what is the case when manure is dug 

 into land planted with bananas and cacao, in 

 which case the banana root3 grow rapidly 

 and densely into the manure to the exclusion of 

 the cacao roots. It would appear that the 

 roots of cacao and Caslilloa elastica agree well 

 in the same soil. The facts that the crop 

 of rubber removes practically nothing more 

 the land, and that the evaporation of water 

 from the Castilloa tree is likely to be less than 

 from ordinary shade trees, speak in favour ol its 

 extensive planting among cacao. 



" It has often been stated that Castilloa 

 elastica, under cultivation, will not yield rubber 

 in paying quantities. It would go beyond our 

 object on this occasion to enter into a descrip- 

 tion of the methods and economies of rubber 

 tapping ; we therefore limit ourselves to stating 

 that, if the right varieties be chosen for plan- 

 ting, excellent returns may bo obtained/'— Kew 

 Bulletin, No. 6, 1910. 



A NEW RES IN CUP. 



Quite recently a new resin cup has been in- 

 vented, which bids fair to revolutionise the 

 collection of resin. The following system is 

 used : Two holes from three-quarters to one 

 inch in diameter are bored into the sap of the 

 tree at a tangent with the heart wood. These 

 holes start from the same place and extend in 

 depth about five inches, but vary according to 

 the diameter of the tree. A patent auger is then 

 used to prepare a place for the attachment of 

 the metal cap, which is fastened snugly over the 

 hole and then nailed in place. The glass cup is 

 locked into the cap and the cup ready for opera- 

 tion. It is claimed that the cup will fill up in 

 from thirty-six hours to two months, according 

 to the grade of timber and the weather condi- 

 tions. Moreover the grade of gum produced is 

 far superior to any secured under the old system, 

 since there is no evaporation and no drift of any 

 kind can get into the sap. Perhaps the most 

 important claim is that the tree is unharmed by 

 this method of tapping and that the timber can 

 be worked for a great many years. . . . The 

 writer feels that in view of the turpentine ex- 

 periments in Chir pine in the Himalaya 

 Mountains the foregoing system would be of 

 great interest to the Indian Forest Service. 

 This new invention will be experimented with, 

 and, if successful, can undoubtedly be applied 

 on all national forests where the turpentine 

 industry is possible. The Supervisor of the Choc- 

 tawahtchee National forest in Florida sup- 

 plied the photographs and information used in 

 this note.— T Salisbury Woolsby, jr.— Indian 

 Forester, for August, 



