The Study of Stellar Evolution 



An Account of Some Modern Methods of Astrophysical Research 

 By GEORGE ELLERY HALE 

 The introduction of photographic methods, the improvement of telescopes, and 

 the rapidly increasing appreciation of the value to astronomy of physical instruments 

 and processes, have revolutionized the observatory. From a simple observing 

 station it has been transformed^ into a great physical laboratory, where^images^of 



of intense heat. The result has been a great gain in our knowledge of tin origin, 

 development, and decay of stars. This books explains in a popular way how the 

 life histories of the sun and stars are investigated. One hundred and four half-tone 

 plates, made from the best astronomical negatives, place before the reader the most 

 recent results of celestial photography in most of its phases. 



250 pages, 10 % plates, 8vo, cloth; net $4-00, postpaid 04.27 

 Address Dept. 38 



THE UNIVERSITY OF CHICAGO PRESS 



CHICAGO NEW YORK 



ESSAYS PHILOSOPHICAL AND PSYCHOLOGICAL 



IN HONOR OF WILLIAM JAMES, PROFESSOR IN HARVARD UNIVERSITY 

 BY HIS COLLEAGUES AT COLUMBIA UNIVERSITY 



This volume is intended to mark in some degree its authors' sense of Professor James's memorable services 

 in philosophy and psychology, the vitality he has added to those studies, and the encouragement that has 

 flowed from him to colleagues without number. From Prefatory Note. 



. Philosophical Essays. 



The New Realism George Stuart Fullertoh 



Does Reality possess Practical Character? John I k vey 



A Factor in the Genesis of Idealism Wendell T. Bcsh 



' a Form of Energy \Vm. Pepperrell Montague 



Perception and Epistemology Frederick J. E. Woodbridge 



Substitutionalism . . ..c A. Strong 



World-Pictures. . Walter Bocohtok Pitkin 



Naive Realism : What Is It? Dickinson S. Miller 



Kant and the English Platonists Arthur O. Lovejoy 



A Critique of Kant's Ethics Felix Adler 



The Abuse of Abstraction in Ethics Herbert Gardiner Lord 



Purposive Consistency, the Outline of a Classification of Values G. A. Tawnet 



The Problem of Method in Mathematics and Philosophy Harold Chapman Brown 



_ " Psychological Essays. 



Pragmatism m ^Esthetics Kate Gordon 



The Consciousness of Relation R, S. Woodworth 



On the Variability of Individual Judgment Frederic Lyman Wells 



The Validity of Judgments of Character Naomi Norsworthy 



Reactions and Perceptioas , , , < : i ' 



A Pragmatic Substitute for Free Will .."..*.".*....". .Edward L. Thorndixe 



With Photograph of Professor James. 



LONGMANS, GREEN & COMPANY. 



91 Fifth Avenue, New York City 



