GENERAL INTRODUCTION 

 AMERICAN CHEMICAL SOCIETY 



BOARD OF EDITORS 



Scientific Series: Technologic Series: 



WILLIAM A. NOYES, Editor, JOHN JOHNSTON, Editor, 



GILBERT N. LEWIS, C. G. DERICK, 



LAFAYETTE B. MENDEL, WILLIAM HOSKINS, 



ARTHUR A. NOYES, F. A. LIDBURY, 



JULIUS STIEGLITZ. ARTHUR D. LITTLE, 



C. L. REESE, 

 C. P. TOWNSEND. 



