Issued April 22, 1912. 



U. S. DEPARTMENT OF AGRICULTURE, 



BUREAU OF CHEMISTRY BULLETIN No. 150. 



H. W. WILEY. Chief of Bureau. 



TECHNICAL DRUG STUDIES 



BY THE 



DIVISION OF DRUGS. 



Examination of Hydrogen Dioxld Solutions. 



By L. F. KEBLER, L. E. WARREN, and E. A. RUDDIMAN. 



The Purity of Glycerin. 



By L. F. KEBLER and H. C. FULLER. 



Notes on Two Important Alkaloidal Reactions. 



By H. C. FULLER. 



The Separation and Identification of Small Quantities of Cocain. 



By H. C. FULLER. 



The Determination of Molybdic Trioxid. 



By B. HERSTEIN. 



A Method for Testing Ammonium Salts. 



By B. HERSTEIN. 



Character of Samples of Beeswax Submitted with Bids. 



By L. F. KEBLER and F. M. BOYLES. 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE. 

 1912. 



