THE ALUMNI JOURNAL 

 MIXING THE LAST DOSE FOR CONGRESS. 



Courtesy of^'PhurniaceuticalEra' and "The Trenton, N.J. Evening Times'. 



DIFFERENTIATING ALPHA- AND BETANAPHTHOLS. 



To differentiate alphanaphthol from betanaphthol, Volcy-Boucher 

 (Apoth.-Ztg., xxiii., p. 522) advocates the following test: Dissolve 

 0.5 Gm. of the naphthol in the smallest quantity of 95 per cent, alcohol 

 required for solution, and then add 2 Cc. of a 10 per cent, copper- 

 sulphate solution and 4 Cc. of a freshly prepared lo per cent, potassium- 

 c\anide solution, and shake thoroughly. With alphanaphthol a violet- 

 red precipitate forms, while betanaphthol gives rise to a yellow one. 

 On now adding enough 95 per cent, alcohol to just effect solution, a 

 rose-red or violet colored solution is afforded by alphanaphthol, while 

 with betanaphthol the solution is a golden-yellow. The reaction is 

 said to afford evidence of the presence of one naphthol in the other. 



