A study in pharmacy*12*Continued from the Journal of the American Pharmaceutical Association, 18 (1929), 214-224.1Scientific Section, Portland meeting, 1928.2This article, written between the years 1879 and 1885, is naturally defective in many directions as contrasted with the researches made since that date. Appreciating this fact the author ventured to place the manuscript in the hands of Dr. Wolfgang Ostwald of Leipzig, with the request that he comment thereon in directions where, in his opinion, his comments could be serviceable. These comments will be found as footnotes under the respective page locations. Unquestionably the readers of the article as well as myself must gratefully accept his thoughtful contributions.