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He inferred from the composition of the different kinds of gam- 

 boge, and other circumstances detailed in his paper, that the cake 

 gamboge of Siam is not entirely a natural production, but a manu- 

 factured article : that Ceylon gamboge, if freed from incidental 

 fibrous matter, corresponds almost exactly with Siam gamboge : 

 that, therefore, they are probably produced by the same plant: 

 that Ceylon gamboge possesses precisely the same medicinal pro- 

 perties : and that this variety, if more carefully collected, may, in 

 all probability, be applied with equal advantage to every economi- 

 cal purpose which is at present served by the finest pipe gamboge 

 of Siam. 



