4 
CONTENTS 
Page 
Physics. — The Mobilities of Electrons . . . . . . By L. B. Loeb 307 
Physiology. — A Method for Obtaining Constants for Formulas of Organic 
Growth . . . By H. S. Reed 311 
Mathematics. — ON the Approximate Solutions in Integers of a Set of 
Linear Equations . By H. F. Blichfeldt 317 
Pathology. — A Physical Basis for Epidemiology . 
By S. Flexner and H. L. Amoss 319 
