The Study of Stellar Evolution 



An Account of Some Modern Methods of Astrophysieal Keaearch 

 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 insinmn-i:t- 

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

 station it has been transformed into a great physical laboratory, where i in a ps <f 

 the sun and stars are studied with many powerful instruments, and celestial pneno 

 mena are experimentally imitated with the aid of electric furnaces and other BOUTCM 

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

 development, and decay of stars. This books explains in a popular way hem 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 tin most 

 recent results of celestial photography in most of its phases. 



250 pages j 104. plates, 8vo, cloth; net $£.00, postpaid $4-27 

 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 ser 

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

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

 _ Philosophical Essays. 



The New Realism GnorgeSt 



Does Reality po*.«- I'm . .v - -.-ru-ter? Johh 



. Pepperrell Monta< 

 ! Frederick j. E.r 



World-Pictures "... '.".*. . . . Walter Bocghtok Pitkin 



Naive Realism : What Is it? .' .77 '.....7.7..* Dickinson S. Miller 



Kant and the English Platonists Arthur O. Lovejoy 



A Critique of Kant's Ethh* .7.7. . . ./.. Felix Adler 



The Abuse of Abstraction in Ethics Herbert Gardiner Lord 



Purpodve Consistency, the Outline of a Classification of Values ■■ • ■ *' r^£1 



The Problem of Method in Mathematics and Philosophy Harold Chapman Brown 



f of Individual Judgment . 



Reaction! a d S Judg - menta e 



a Ph^!£ SaSteTor' FreeViu. 7.7. 7777 7777 7777. 77 7 7. 77/77. 7 e^ward l. thorndikr 



With Photograph of Professor James, 



LONGMANS, GREEN & COMPANY. 9! Fifth Avenue, New York City 



