CEKEBRINE. TO 



emulsion in water it is precipitated by neutral salts, 

 such as sodium chloride. 



3. Heated on platinum foil it quickly decomposes, 

 burning with a peculiar smell, and leaving a difficultly 

 combustible charcoal, and at last a white residue of 

 phosphoric acid. 



4. Treat cerebric acid with concentrated sulphuric 

 acid a red solution will be formed. Add a little 

 sugar a deep purple colour will be developed, similar 

 to that obtained with bile acids (q. v.). 



AaBC 



HH' 



Spectrum of cerebric acid reaction. 



5. Dissolve in boiling alcohol, and add sufficient 

 alcoholic potash or soda. A voluminous white pre- 

 cipitate (alkaline cerebrate, Fremy) is formed, and on 

 further boiling will partially dissolve, Filter hot a 

 white body remains on the filter, which after drying 

 dissolves in boiling alcohol, leaving only a scanty 

 yellow resinous residue, and on cooling deposits pure 

 Cerebrine (Miiller) . 



6. Fremy 5 s cerebric acid and Liebreich's protagon ; 

 are probably compounds, or mixtures in atomic pro- 

 portions, of lecithine and cerebrine, as appears from the 

 above decomposition and the following comparison of 

 their elementary composition. 



