517 



u (2) The Director ©f the Customs Department will send and 

 " collect samples of rubber and formulate precise instructions for 

 " distinguishing between the three qualities above-mentioned. 



" (3) The Chief of the Customs Department of Mozambique 

 " will send monthly to the Governor of that district a note of the 

 " exportation of rubber with the necessary explanations in order 

 " that that authority may estimate the results of this arrangement 

 " and report to the Governor-General." 



RUBBER IN BERMUDA. 



From the Report of the Board of Agriculture of Bermuda for the 

 year 1901, it would appear that a commencement has been made to 

 cultivate Para in that Island, vide the following extract : — 



Rubber trees for the Marsh lands. 



After three years I have succeeded in securing some seeds of the 

 Para Rubber Tree (Hevea Braziliensis) which have germinated and 

 are now growing. I have estimated that should the tree succeed 

 in Bermuda, and sufficient plants are raised to plant the 400 acres 

 of Marsh land, in six years a return of £20,000 worth of rubber 

 (at the present prices) should be realized per annum. It is thought 

 that the temperature here is unsuitable yet some plants of Castilloa 

 elastica, and the Ceara rubber tree, are growing luxuriantly in the 

 Public Garden, although the same was thought of it, i.e., that the 

 temperature would not be high enough. 



METHODS OF EXTRACTION OP GUTTA 

 PERCHA AND RUBBER 



A short account of the methods of extracting Rubber and Gutta 

 percha from bark or leaves is published by M. Gaher in the Moni- 

 teur Scientifique. 



Extraction of Gutta percha from leaves. 



Rigolc s process. The leaves are treated with a very volatile 

 solvent by preference carbon disulphide. The solvent is removed 

 by passing a current of steamo ver it and the isolated gutta purified 

 by hydro-chloric acid and zinc chloride. 



Scrullas process. An alkaline solution is employed to separate 

 the cellulose then the Gutta is dissolved in toluene in preference to 

 Benzine. M. Serullas proposes also to destroy the cellulose by re- 

 agents at temperatures not effecting the Gutta. 



Arnaud and Houseal process. The leaves are reduced to pow- 

 der thrown into a great quantity of water, the gutta which comes 

 to the surface is collected and pressed into a mass. 



Blanchard Vivier process, consists in treating by alcohol which 

 dissolves the resins chlorophyll and other impurities, then treating 

 with carbon tetrachloride which dissolves the gutta. 



Extraction of Rubber from the Bark. 



The Deiss process, was described in the last number of the 

 Journal. 



