The American Journal of Science 



Established by Benjamin Silliman in 1818 



The Leading Scientific Journal in the United States 



Devoted to the Physical and Natural Sciences, with special reference to 

 Physics, and Chemistry on the one hand, and to Geology and Mineralogy 

 on the other. 



Editor: EDWARD S. DANA. 

 Associate Editors : Professor GEORGE L. GOOD ALE, JOHN TROWBRIDGE, W. G. FARLOW and WM. M. DAVIS 

 of Cambridge ; Professors A. E. VERRILL, HENRY S. WILLIAMS and L. V. PIRSSON, of New 

 Haven ; Professor 0. F. BARKER, of Pnllrdelphia ; Professor J08EPH S. AIMES, 

 of Baltimore ; MR. J. S. DILLER, of Washington. 

 Two volumes annually, in monthly numbers of about 80 pages each. 



This Journal ended its first series of 50 volumes as a quarterly in 1845; its second 

 series of 50 volumes as a two-monthly in 1870 ; its third series as a monthly ended Dec- 

 ember, 1895. A Fourth Series commenced in 1896. 



Subscription price, $6 per year or 50 cents a number, postage prepaid in the United States ; 

 $6.25 to Canada ; $6,40 to Countries in the Postal Union. Back numbers at reduced prices. 

 JOrTen- Volume Indexes, Vols. I-X XI-XX, fourth series, price one dollar. Address 



The American Journal of Science 

 New Haven, Conn. 



SECOND EDITION, NOVEMBER, 1910 



AMERICAN MEN OF SCIENCE 



A BIOGRAPHICAL DIRECTORY 

 EDITED BY J. HcKEEN CATTELL 



A Biographical directory require! revision if it it to maintain its usef ulness. Nearly a third of the names in the 

 present edition are new, and the sketches which appeared in the first division have in nearly every case been revised. The 

 amount of work required to prepare Ike revision has been as great as that given to the first edition. There has been no 

 change n the general plan or the work. Greater strictness has been observed in confining its scope to the natural and 

 exact sciences, and for this reason a few names included in the first edition have been omitted. Efforts have been exerted to 

 make the book as complete and accurate as possible. There are of course (missions, if only because some men will not 

 ~ j exo-i ?> r> } ^>>., r r, >,v/.v' T ' n .- •>■: . •• ? - • •<• '-• -. ■ • . f • <. ' 



b V ^ methods that were used before, and stars have been added to the subjects of research in the case of 269 new men who 

 have obtained places on the list. The editor's object in selecting this group of scientific men has been to make a study of 

 the conditions on which scientific research depends and so far as may be to improve these conditions. 2 here are printed t» 

 an appendtx the two statistical studies that have been made,— From the Preface to the Second Edition. 



The second edition of the Directory extends to more than 600 pages and contains more than 5500 sketches. 

 It is well printed on all rag paper and bound in buckram with leather label. Although the work has been 

 increased in size by more than 50 per cent., it is sold at the same price aa the first edition. 



Price : Five Dollars, net, Postage paid 



THE SCIENCE PRESS 



OARRISON, N. Y. LANCASTER, PA. 



SUB-STATION 84, NEW YORK CITY. 



