390 [Jan. 15, 



cation is effected by dissolving this mass in a large quantity of boiling 

 water, and filtering from insoluble oily substances ; on cooling, the 

 sulphate separates in white needles, which, on boiling with alcohol, 

 become perfectly pure. 



In order to liberate the base, the sulphate is suspended in weak 

 alcohol, and submitted to the action of caustic soda : a solution is 

 thus obtained, which, on the addition of water, deposits the new 

 base in scaly crystals. They require only to be washed with water, 

 to be redissolved in alcohol, and to be reprecipitated by addition of 

 water. 



Thus obtained, this substance presents itself in small white needles 

 or scales, which are apt to assume a greyish tint on drying, very 

 slightly soluble in boiling water, easily in alcohol and ether. This 

 base fuses at 45, and boils at 322, distilling without the slightest 

 alteration. 



The numbers obtained in the analysis of this substance may be 

 translated into the formula 



C 12 H U N; 



and this expression is unmistakeably corroborated by the examina- 

 tion of several well-defined saline compounds, more especially the 

 sulphate, chloride, and nitrate. 



Sulphate. This salt, repeatedly mentioned, is remarkable for its 

 very sparing solubility in cold, and even boiling water ; the boiling 

 aqueous solution deposits small needles of the composition 



This salt is somewhat more soluble in alcohol. 



Nitrate. Large white plates, moderately soluble in water, which 

 are obtained by dissolving the base in dilute nitric acid, and recry- 

 stallizing the first crop of crystals from boiling water. Composition : 



C 12 H ia N 2 3 =C 12 H n N,HN0 3 . 



The chloride is readily obtained in small white needles, somewhat 

 more soluble in water than the sulphate. It was found to contain 



at 100, 



C 12 H U N,HC1. 



The platinum-salt falls as a precipitate of a pale yellowish colour 

 with a tint of grey, which under the microscope is found to consist 



