THE UNIVERSITY OF CHICAGO PRESS 



The Study oj Stellar Evolution: An Account oj Some Modern 

 Methods of Astro physical Research. By George Ellery Hale, 

 Director oj the Solar Observatory oj the Carnegie Institution, 

 Mount Wilson, California. 



250 pages, 104 plates, 8vo, cloth; net $4.00, postpaid $4.27 



In untechnical, clear-cut language, easily followed by the 

 layman, this work by one of the foremost authorities in the field 

 of astrophysical research presents a fascinating account of the 

 study of the origin, evolution, and decay of celestial bodies, and 

 of the instruments and methods of a modern observatory, accom- 

 panied by illustrations in the text, and by a series of plates repro- 

 ducing a number of the best and most recent photographs obtained 

 with the largest telescopes. 



London Times. When a man is rapidly exploring untrodden ground, it is 

 not easy for him to find time for giving a popular account of his explora- 



tions. We 



enterp 



Herein we may read not only how the biggest lens in the world has been 

 mounted and set to work near Chicago, but also how the two longest 

 telescopes in the world have been set up on Mount Wilson, one horizon- 

 tal y along the ground, and one vertically, with a high tower and a deep 



TITO! V*/^ ttr^*, J ^*-£, .1 — 1 A 1 1 • I - * 



well. 



arm 



chairs, practically put us in possession of the same knowledge which 

 has been won by others with so much labor. 



World 



ot the actual working of an observa 

 Mount Wilson 



Hale has had the good fortune to organize. It is the kind of a book that 

 an educated person who is really interested in scientific procedure will 



will be greatly 



»/ 



nm oj ermsn Astronomical Association. Prof. Hale, who is one of the 

 foremost authorities in the astronomical world, explains in language 

 adapted to the "man of the street," the discoveries that have been made 

 in that branch of science which is now known as the New Astronomy. 



instruments 



clear, non-mathematical language tells how the results obtained by their 



Wnt'-L 1 nt T eted - T1 ? e book appeals to the ordinary as well as to the 



n^tj I\l Udi ° n kymg * down ' one feels that Jt w not a work to be 



I't doe not ™t ^ P ' Ut i" 5 £f * ThC langUage and ^ are such that 

 it does not contain a single "dry" page. 



^i&^ iS ° ne that does not rec I uire ««* technical 



and comSw S? ^ f tronom y or w ^h physics. The pleasing style 



and X™ tL T* ° f , any traC - e u° f eg0tism ' «* e the book a character 

 ana charm that are rarely met with. 



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