AMERICAN MEN OF SCIENCE 



567 



study, 8 or 120 in all, 80 consented to under- 

 take the arrangement, and of these 68 sent in 

 valid lists. Others in the order of eminence 

 were then asked until ten lists were obtained 

 in each science. This study has thus only 

 been made possible by the cooperation of those 

 whose time is of much value. My personal 

 obligations to them are very great. 



The names of those selected for arrange- 

 ment included all who were known to have 

 done research work of any consequence, and 

 those who arranged them were asked to add 

 any who had been omitted. Some names de- 

 serving consideration were doubtless neglected 

 and consequently would not find a place in 

 the first or second thousands as ultimately 

 selected. Each of those included in the first 

 group is probably among the leading thou- 

 sand scientific men in the United States, but 

 there are a few others who belong to this 

 group though not included. It might be a 

 service to science to print the list of our 

 thousand leading scientific men in the order 

 of merit together with the probable error of 

 each position, but it would require courage to 

 do this, and perhaps it would not be possible 

 to obtain the arrangement if it were to be 

 made known. In the " Biographical Directory 

 of American Men of Science " those are indi- 

 cated by stars who belong either to the group 

 as selected seven years ago or as selected now. 

 Those who have won a place in the group can 

 be identified by a comparison of the two edi- 

 tions of the book. Those who have lost their 

 places in the group can not be known. 



The arrangements of each of the two lists 

 extended over a period of some months. The 

 first list may be dated as approximately of 

 January 1, 1903, and the second list as ap- 

 proximately of January 1, 1910. The distri- 

 butions given in the previous paper refer 

 approximately to January 1, 1906, the resi- 

 dences and positions used being those given in 



8 Six were not asked owing to their illness or 

 absence from the country. These conditions also 

 account for a number of those who did not reply 

 to the letter or did not consent to make the 

 arrangement. 



the first edition of the directory. For the 

 present list, the residences and positions are 

 those of January 1, 1910. It would be better 

 if the arrangement of the first list and the 

 distributions referred to the same date, but it 

 was not possible to work up the data more 

 promptly, as the writer was able to attend to 

 the compilation of the directory and the 

 statistics only during the summer months. 

 In collecting and compiling the data he has 

 had the very valuable assistance of Professor 

 V. A. C. Henmon, of the University of Wis- 

 consin, and of Mr. E. K. Strong, Jr., fellow in 

 psychology in Columbia University. 



Those included in the list of 1903 who died 

 prior to 1910 number 58. It is a roll of honor 

 which may be given here: 



1903 (in part) 



BOLTON, HENBY CABRINGTON Chemistry 



RHOADS, EDWABD Physics 



1904 



BEECHEB, CHABLES E. Geology 



DBOWN, THOMAS MESSENGER Chemistry 



HATCHES, JOHN BELL Geology 



HERBICK, CLARENCE LUTHEB Zoology 



PALMER, ARTHUR WILLIAM Chemistry 

 DE SCHWEINITZ, EMiL ALEXANDEB Chemistry 



1905 



BBACE, DEWITT BRISTOL Physics 



ELDRIDGE, GEORGE HOMANS Geology 



ELLIS, JOB BICKNELL Botany 



EWELL, EBVIN E. Chemistry 



MATTHEWS, WASHINGTON Anthropology 



PACKARD, ALPHEUS SPBINO Zoology 



PRESCOTT, ALBERT BENJAMIN Chemistry 



WARDER, ROBERT BOWNE Chemistry 



WOOD, EDWARD STICKNEY Chemistry 



1906 



LANGLEY, SAMUEL PIERPONT Physics 



MACCALLUM, JOHN BRUCE Anatomy 



MILLER, EDMUND HOWD Chemistry 



MORGAN, ANDREW PRICE Botany 



PAULMIEB, FREDERICK CLARK Zoology 



PEIRCE, JAMES MILLS Mathematics 



PENFIELD, SAMUEL LEWIS Mineralogy 



RUSSELL, ISRAEL COOK Geology 



SHALEB, NATHANIEL SOUTHGATE Geology 



