224 Proceedinqs Columbia Biochemical Association [March, 



P. M. on Feb. 5, 191 5. The appended summary facilitates refer- 

 ence to the abstracts (171-176) of the papers presented, pages 224, 

 227. 



A SUMMARY OF THE NAMES OF THE AUTHORS AND OF THE 

 TITLES OF THE SUCCEEDING ABSTRACTS (171-176) 



A Edwin D. Watkins. Studies of some 



Allan C. Eustis. The detoxicating Compounds of cinchona alkaloids, 



effect of the Hver of Cathartcs certain metals and phosphoric acid. 



aura upon Solutions of /3-imidazo- (174) 



lylethylamin. (171) 



V. E. Levine and Herman Yahr. B 



Reductions with Compounds of the F. G. Goodridge. Biochemical studies 



rarer Clements: I. Ammonium mo- of mercaptan. (175) 



lybdate. (172) M. K. Thornton. Efforts to precipi- 



Max Morse. Autolysis and nuclear täte pepsin and erepsin with safra- 



relations. (173) nin. (176) 



A. ABSTRACTS OF PAPERS BY NON-RESIDENT MEMBERS 



171. The detoxicating effect of the liver of Cathartes aura 

 upon Solutions of iS-imidazolylethylamin. Allan C. Eustis. 

 (Dep't of Dietetics and Nutrition, Coli, of Med., Tulane Univ.,-. 

 New Orleans.) Published in this issue : Biochem. Bull., 1915, 

 iv, p. 97. 



172. Reductions with Compounds of the rarer elements. 

 I. Ammonium molybdate. Victor E. Levine and Herman M. 

 Yahr. {Lah. of Organic Chem., Fordham Univ. Med. Coli., N. 

 Y. City.) Ammonium molybdate, in acid sol, heated with many 

 organic Compounds, gives rise to a green, greenish-blue, or blue 

 coloration. That this effect is due to reduction of the ammonium 

 molybdate may be concluded from the following observations. 

 Gaseous hydrogen produces the characteristic color, when led 

 through a sol. of the molybdate acidified with hydrochloric or pref- 

 erably with sulfuric. Acetylene, sulfur dioxid and hydrogen sulfid 

 react similarly. Carbon mon-oxid gives negative results. Potas- 

 sium iodid treated cold, and sodium bromid treated hot, with am- 

 monium molybdate acidified with sulfuric acid, also produce a blue 

 color. Ferrous and stannous Compounds can be distinguished from 

 ferric and stannic, the former two giving the color reaction; the 

 latter, not. Arsenious oxid yields a dark green color. Oxidizing 



