6 THE ALUMNI JOURNAL 



A L U M N I B A L L. 



Wednesday, January 29TH, 1913. 



AT HEALY'S. 



Alumni, do not miss this. Bring your ladies and friends. An ex- 

 cellent entertainment will precede the dancing. Crowley's Seventh 

 Regiment Band will play. Ticket, admitting Gentleman and Ladies, 

 is $1.50, and can be obtained at the College of Pharmacy, 115 West 

 68th St., New York City. 



The Date: January 29th, 191 3. 



The Place: Healy's, 66th St. and Columbus Ave. 



Remember, this is the last call. 



PEROXIDE PRODUCTION, PAST AND PRESENT.* 

 ' ( Continued. ) 



J. S. BREWER, PHAR. D. 



N. Y. C. p. '02. 



TESTING FOR STRENGTH. 



Glycerin and boroglyceride affects the titration of peroxide with 

 permanganate. The permanganate method is worthless if the per- 

 oxide is preserved with salicylic acid. Smith, after very exhaustive 

 experiments, thinks the permanganate method of titration is worth- 

 less in the presence of organic substances. The thiosulphate method 

 of estimating the strength of solutions of peroxide is the safest and 

 best for all-around purposes, as it is unaffected by any of the ordinary 

 preservatives. It is simple, rapid, and accurate and is based upon 

 the fact that hydrogen dioxide liberates a definite quantity of iodine 

 from iodides in acid solution. 



USES. 



Peroxide of Hydrogen was formerly thought to be valuable for 



diphtheria but subsequent experience has proved it to be valueless 



for this purpose. It is fearful and wonderful to observe the light in 



which the ordinary layman regards peroxide. It is used as a gargle 



in sore throats, as a mouth wash, for cuts, scratches, bites of insects, 



bruises, and even burns, although its employment for the latter use 



*Kead at the Summer Meeting of the Northwestern Branch of the A. Ph. A., at 

 Winona, Minn., June 19th, 1912. — Reprinted from Jour. A. Ph. A. 



