Page:Popular Science Monthly Volume 66.djvu/299

Rh

leading American and German masters. For seven years he occupied the chair of analytical chemistry at Lafayette College, and for ten years a similar chair at the Massachusetts Institute of Technology. One of the founders of the American Institute of Mining Engineers, he served with conspicuous efficiency for ten years as its first secretary and editor of its Transactions, being later elected to honorary membership and in 1897 to its presidency. Dr. Drown did important original work in quantitative analysis in two directions. In metallurgy he devised methods which have become standard in the analysis of iron and steel. In sanitary chemistry 1 he introduced improvements both in the methods and in the interpretation of water analysis. As chemist in charge of the investigation of the natural waters of Massachusetts, he instituted a series of investigations which resulted, among other things, in the unique map showing the distribution of 'normal chlorine' in the springs and wells of the entire state. Dr.