CONTENTS 
Page 
Anthropology.---The Indian and Nature By Alice C. Fletcher 467 
Physiology. — The Mechanism of Antagonistic Salt Action . By Jacques Loeb 473 
Agronomy. — ^The Nitrogen Problem in Arid Soils . . By Chas. B. Lipman 477 
Astronomy. — A Notation for use ii5 the Discussion of Star Colors . 
By Frederick H. Seares 481 
Astronomy. — Distribution of Colors Among the Stars of N. G. C. 1647 and M 67 
By Frederick H. Seares and Harlow Shapley 483 
Physics. — On Thiele's Thase' in Band Spectra . . By Horace Scudder Uhler 487 
Zoology. — ^Why Polar Bodies Do Not Develop . . . By Edwin G. Conklin 491 
Astronomy. — Radial Velocities of the Planetary and Irregular Nebulae 
By W. W. Campbell and J. H. Moore 496 
