1863.] 389 



current, the other might be unable to resist attack. There was 

 no comparison between the position of the stomach and that of 

 the rabbit's ear, and the question, according to his view, resolved 

 itself into degree of power possessed by the acidity of the contents of 

 the stomach on the one hand, and the alkalinity of the circulating 

 current on the other. 



The author concluded by adducing experimental evidence to show 

 that pepsine was contained in the walls of the stomachs of persons 

 who had died from severe diseases, as well as in the normal fasting 

 and digesting stomach. 



January 15, 1863. 



Major-General SABINE, President, in the Chair. 

 The following communications were read : 



I. " Notes of Researches on the Poly-Ammonias. No. XXII. 

 Secondary Products formed in the Manufacture of Ani- 

 line." By A. W. HOFMANN, LL.D., F.R.S. Received 

 December 18, 1862. 



In a short paper submitted to the Royal Society some weeks ago, 

 I have recorded some experiments on the basic compounds di- 

 stilling at very high temperatures, which are formed as secondary 

 products in the manufacture of aniline, and which are known in the 

 ateliers of MM. Collin and Coblenz as queues d'aniline. I have 

 mentioned that the bases which distil above 330, when treated with 

 dilute sulphuric acid, furnish a soluble sulphate, the sulphate of 

 paraniline, the history of which I have already traced, and a sul- 

 phate remarkable for its insolubility in water. It is this insoluble 

 sulphate, and the base from which it is derived, that form the subject 

 of the following notice. 



The insoluble sulphate which is formed on treating the queues 

 d'aniline boiling above 330 with cold dilute sulphuric acid, sepa- 

 rates as a yellowish semisolid crystalline mass, contaminated with 

 considerable quantities of the oily sulphates of other bases. Ebulli- 

 tion with alcohol removes these substances pretty well, and the sul- 

 phate becomes more crystalline and nearly white. A further purifi- 



VOL. XII. 2 F 



