August, 1918 C. U. C. P. ALUMNI JOURNAL 129 



An applicant for a license must appear in person and fill out an official printed 

 form provided for the purpose, and under oath state the kind of ingredients of 

 explosives purchased, disposed of or used by said applicant during the six months 

 preceding the date of the application, and also the quantity of each remaining on 



hand. 



A license fee of 25 cents is charged and payable to the licensing official, and 

 25 cents for each certified copy of the license issued. Copies must be issued by the 

 licensing official only. 



Another feature of the act is the question of records to be kept of sales and 

 uses. If a sale is made, it must be recorded, and the sale made only to one pos- 

 sessing a purchaser's license if in amount more than one ounce. The person buy- 

 ing the same must be known to the vendor as a responsible party to possess the 



same. 



The prime objects sought by the enactment is the conservation of the supply 

 of crudes that enter into the production of munitions. Also to thwart, if possible, 

 any attempt at unlawful acts by enemy aliens or sympathetic partisans, and thereby 

 protect life, limb and property, by avoiding indiscriminate use and storing, and 

 careless handling. In short, to control explosives and explosive ingredients from 

 start to finish. 



ASSAY OF GLYCERIN IN MIXTURE OF RHUBARB AND SODA* 



By H. V. Arny and Philip Breivogel 



Those analysts who have been called upon to conduct glycerin assays are well 

 aware of the unsatisfactory character of the several published methods of assay. 

 The method suggested by Leech in his classic book, Food Inspection and Analysis, 

 is known to possess the fatal error of directing at some stage of the process the 

 use of heat, although it is known by those who have studied the problem systemat- 

 ically that glycerin evaporates in water vapor even at water bath heat. The 

 Briggs process. Jour. A. Ph. A., January, 191 5, 75, aside from the high cost of 

 the sandalwood oil needed in the operation, gave us results that were far from 

 satisfactory. 



Our fellow member. Dr. J. L. Mayer, gave us the lead to a successful assay 

 of glycerin in mixture of rhubarb and soda by suggesting the evaporation of the 

 sample at a heat not greater than 50 degrees C, and finally subtracting from the 

 v/eight of the evaporated residue thus obtained, the weight of sodium bicarbonate 

 in the sample as ascertained by the ash determination. 



This led us to a study of the influence of a temperature of fifty degrees on 

 aqueous solutions, and we found that with samples of known strength the loss of 

 glycerin was appreciable. Thus 3 mils of such a solution containing 1.57 Gm. 

 glycerin 100 percent, on heating to 50 degrees for 2 hours left 1.54 Gm. of residue, 

 2. loss of 2 percent. ; and in another case 4 mils of the solution containing 2.094 

 Gm. glycerin left 2.027 Gm. of residue, a loss of about 3.5 percent. 



*Read at the Annual Meeting of the N. Y. S. P. A. 



