SCIENCE— ADVERTISEMENTS 



SCHOLARSHIP MAN 



in the physical soienoea, with experience in university 

 work, thoroughly familiar with scientific methods and 

 literature, and with knowledge of French, German, 

 Italian and Spanish, desires position with publisher 

 of scientific literature, or in scientific institution. 

 High est references. Address "J. W," care 'Science," 

 Garrison, N. Y. 



JULIEN'S POWER AND FOOT LATHES 



Use of Geologists, Mineralogists, Petrographera, Met 

 allnrgists. Mining Engineers, in SLICING an-" 

 POLISHING all hard substances, rocks, etc., and in 

 preparation of MICROSCOPIC THIN SECTIONS. 



GUSTAVUS D. JULIEN 



3 Webster Terrace NEW ROCHELLE. N. Y. 



ROMEKE^S 



PRESS CLIPPINGS 



are now an absolute necessity for every scientific man. 

 By methodical searching through the most important 

 papers and periodicals published in this country and 

 abroad we are able to supply you at short notice with 

 Information on any subject which perhaps you would 

 be unable to find yourself in libraries or reference 

 books after spending days or even weeks at fuch a 

 task. Write for further information. 



HENRY ROMEIKE, Inc. 

 J JO-1 12 West 26th St., New York Gty 



WOLFF 

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JAMES Q. BIDDLE 



Special Agent lor United Slates 



1211-13 Arch St. Philadelphia 



Be sure to vi-it our New Exbibi ion Room 



SECOND MDITION, NOVEMBER, 1910 



AMERICAN MEN OF SCIENCE 



A BIOGRAPHICAL DIRECTORY 

 EDITED BY J. HcKEEN CATTELL 



A Biographiccd directory requiret remsion if it is to maintain its usefulness. 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 the revision has been as great ai that given to the first edition. There has been m> 

 chamge in the general plan of the work. Greater strictness has been observed in confining its scope to the natural and 

 exact scierKes, andfor this reason a few names included in the first edition havebeen omitted. Efforts have beenexerted to 

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

 reply even to repeated requests for the information needed. The thousand leading men of science have been again selected 

 by the methods that were used before, and stars have been added to the subjects of research in the cane ofS69 new men who 

 have obtained places on the list. The editor's object in selecting this group o^ 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. 1 here are printed in 

 an appendix the two statisticcd 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 as the first edition. 



Price : Five Dollars, net, Postage paid 



THB SCIENCE RRESS 



GARRISON. N. Y. LANCASTER, PA. 



SUB-STATION 84, NEW YORK CITY. 



