QQ VEB BEN A CEM 



r 



render these processes abnormal by causing the vegetable acids 

 to ferment by exposure to the air and to yield carbonic acid as 



the 



lending sap exuding from the wound might convert it into 

 insoluble calcium carbonate which would harden in the 



,vity 



U 



Meeting of the Nilgiri Natural History Society, Ootacamuiid, 



Novemb 



^ Teak wood yields on distillation with water an opalescent 

 distillate impregnated with resinous matter, but no trace of 

 essential oil could be obtained when operating with 126 lbs. 

 of fresh sawdust from Indian teak. For the extraction of the 

 tar two earthen pots were used luted together ; the upper with 

 a perforated bottom contained the wood in chips ; the product 

 was a rathef liquid black tar having much the odour of coal 

 tar. ^ One pound of the sawdust exhausted with alcohol yielded 

 a resinous extract, which, after having been well washed with 

 hot water, weighed half an ounce ; the resin is black, and has 

 the peculiar odour of the wood. 



The late R. Romanis IJn. Chem. Sac, 3-11-87^ found that 



resrn 



rystaUine 



he also found to be present in considerable quantity in the 

 tar resulting from the destructive distiUation of teak. The 

 analyses which he has made of the crystals point to the empirical 

 formula C^ H^^ O; on oxidation with nitric acid they yield 

 what appears to be a quiuone of the formula C^sHisO^. 



^< 



PREMNA INTEGRIFOLIA, Linn. 



-Fig.-^Wight Ic, t, 1469 ; Rumph. Herb. Amh. in., t. 



Hab.^Coaat8 of India from Bombay to Malacca, Sil 

 Ceylon. The leaves and root. 



and 



