CONTENTS 
Page 
Physiology. — Feeding Experiments with Mixtures of Foodstuffs in 
Unusual Proportions By T. B. Osborne and L. B. Mendel 157 
Genetics. — Variation and Inheritance in Size in Trypanosoma Lewisi. 
By W. H. Taliaferro 163 
Biology. — Note on Moving Equilibra By A. J. Lotka 168 
Mathematics. — A Formula for the Vicosity of Liquids . 
By H. B. Phillips 172 
Astronomy. — The Angular Diameter of Alpha Bootis by the Interfer- 
ometer By F. G. Pease 177 
Astronomy.'— Changes Observed in the Crab Nebui,a in Taurus .... 
By J. C. Duncan 179 
