igi4] 'Alfred P. Lothrop 303 



B GiES. A further study of the phar- 



WiLLiAM J. GiES. Exhibitionof alarge macology of sulfocyanate. (117) 



mass of mixed lipins that had been Alfred P. Lothrop and William J. 



dialyzed through rubber. (115) Gies. A further study of dental 



Max Kahn and William J. Gies. A caries. (118) 



further study of the biochemical x\rthur W. Thomas. The organic 



origin of sulfocyanate. (116) constituents of raw and burned 



Charles C. Lieb and William J. soils. (119) 



A. ABSTRACTS OF PAPERS ON RESEARCH BY NON-RESIDENT 



MEMBERS4 



108. A rapid clinical test for hyperglycemia. S. Gitlow 

 AND B. HoROWiTZ. {Biockemical Laboratory, Fordham Univer- 

 sity Medical School.) Published in füll in this issue of the Bio- 

 chemical Bulletin at page 2'/2. 



109. The action of ammonia on phenols. B. Horowitz. 

 (Biochemical Laboratory, Fordham University Medical School.) 

 This work was a continuation of that done on the action of am- 

 monia on thymol.^ The phenols selected were the following: 

 Phenol, Wi-cresol, thymol, a-naphthol, tyrosin, resorcin, orcin, Vanil- 

 lin, phloroglucinol and pyrogallol. To 0.5 gm. of substance, 100 

 CG. of 10 percent ammonium hydroxide sol. were added and the 

 Solutions allowed to stand. All developed colors sooner or later; 

 tyrosin, very slowly. These colorations were different with each 

 phenol, but none even remotely approached the beautiful blue that 

 thymol yielded. Extraction of the alkaline liquids with ether gave 

 colorless layers for all except naphthol (light dirty brown), and 

 thymol (beautiful red or reddish violet). This, then, is a distin- 

 guishing test for thymol. Equal quantities of the colored products 

 were mixed and extracted with ether. The ether layer at first 

 showed the pink (thymol) color, but later assumed a brownish 

 tinge. 



It has been shown in the case of thymol that oxygen is an im- 

 portant factor in the color formation. The amount of oxygen ab- 

 sorbed was measured by inverting a thymol-ammonia mixture over 

 water, and measuring the rise of the liquid in the tube. Analogous 



■* Members of the Association who were not officially connected with the 

 Columbia Biochemical Department when the researches were conducted. 



5 Gies : Biochemical Bulletin, 1912, ii, p. 171 ; 1913, ii, p. 293. Horowitz : 

 Dissertation; Columbia University, 1913. Pp. 68. 



