The Preparation and Properties of Neutral Ammonium Salts of Organic Acids. . . . . . Precautions in the Use of the Bunsen Photometer Head. James Francis Abbott 81 LeRoy McMaster 99 JANUARY, 1915 Issued in two parts: Part I-Two numbers devoted to studies in pure and applied sciences; Part II-Two numbers devoted to studies in philology (including literature), philosophy, psychology, historical and social sciences. Published quarterly, in January, April, July, and October, by Washington University, St. Louis, Mo. Entered as Second-Class Matter in the Post-Office at St. Louis, Mo. |