210 THE PRODUCTS OF ALBUMINOUS DIGESTION. 



To isolate the brown pigment, finally, the second bromine pre- 

 cipitate is filtered off, washed with water, dissolved in very dilute 

 ammonia, reprecipitated with acetic acid and washed with water, 

 and briefly with 95 per cent, alcohol, both o'f which dissolve a por- 

 tion of the pigment. It is then dried and washed with ether. The 

 resulting product is almost black. 



For the isolation of the other amino-acids which result on hydro- 

 lytic decomposition of the albumins the reader is referred to the 

 journalistic literature upon the subject, and notably the papers by 

 Ernil Fischer and his pupils (Zeit. /. PhysioL Chem., vol. xxxiii. 

 et seq.). 



