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Sect. XII.] 



BOTANY. 



411 



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Cassia. — Botanical specimens of the plants ^^^'^n to yield 



Cassia bark in Kwagse^ China , Malabar, Egypt (and 



Cassia-buds of the OTOcers' shops.~To procure speci- 

 mens of the bark in Cochiu-China and Japan^ and flower- 

 ing specimens for the Her^'^rium. 



Mhuharb. —The true source of the medicinal rhubarb, 

 and especially of the Batavian rhubarb. Strange to say. 

 we are still in the dark respecting the real origin of this 

 most valuable drug ! In this and all such cases the drug 





should be procured by one who is an eye-^witncss to it 

 being gathered, and specimens of the foliage and fruit 

 should accompany it, and be carefully dried for the 

 Herbarium on the spot. 



Arrow-roof. — The sources of the East Indian arrow- 



X 



5 



S 



? 



^ 





root. It is made largely at Travancore. 



IP 



Salep 



•The different plants which yield salep in Asia 



Minor, Persia, and especially the best kinds. 



Aloes. — The true sources of the Soccotrine, Cleai 

 Bombay, Hepatic, Eabi Indian, and Mocha Aloes. 





Minia 



orneo. — Whence is 



this solid oil or fat obtained ? Is it abundant or rare ? 



Gutta Percha, — That of Singapore is ascertained to 

 be the product of a new plant, Isonandra Gutta of 

 Hooker, in the ^ London Journal of Botany,' vol. vi. p, 

 331, 463, tab. 17. The appearance of the inspissated 

 gum which is imported from. Borneo under that name 

 indicates a different source. Other Malay islar 



IS 



are 



plants. 



Percha^ but probably from yet other 



This should be 



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the cliemical 



characters of the juice in a fresh state should be ascer- 

 tained, and compared with those of caoutchouc. 



T 2 



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