326 



mining in the alcoholic solution, and after the alcohol has been 

 driven off, the quantity of sulphuric acid by means of a salt of 

 baryta, and by subtracting this weight from that of the sulphate 

 of the alkaloid, the rest represents the quantity of the pure 

 alkaloid. 



The isolation of the alkaloid is efiected by distilling the sulphate 

 with soda-ley, shaking the distillate with ether, decanting the 

 ethereous liquid and evaporating by means of the air-pump. 



The investigation of the physical and chemical properties of the 

 composition and constitution of the volatile alkaloid is the object 

 of further experiments. 



Table of Coniparisou between Celsius' and FaLrenlieit's 

 Tliernionietric Scales, 



