Dana — American Journal of Science, 1818-1918. 39 



increased by the addition of Henry S. Williams (1894), 

 andO. C. Marsh (1895). 



Of the valuable work of those more or less closely asso- 

 ciated in the conduct of the Journal at the present time, 

 it would not be appropriate to speak in detail. It must 

 suffice to say that the services rendered freely by them 

 have been invaluable, and to their aid is due a large part 

 of the success of the Journal, especially since the Fourth 

 Series began in 1896. But even this statement is inade- 

 quate, for the editor-in-chief has had the generous assist- 

 ance of other gentlemen, whose names have not been 

 placed on the title page, and who have also played an 

 important part in the conduct of the Journal. This 

 policy, indeed, is not a matter of recent date. Very 

 early in the First Series, Professor Griscom of Paris, as 

 already noted, furnished notes of interesting scientific 

 discoveries abroad. Other gentlemen have from time to 

 time acted in the same capacity. The most prominent of 

 them was Professor Jerome Nickles of Nancy, France, 

 who regularly furnished a series of valuable notes on 

 varied subjects, chiefly from foreign sources, extending 

 from 1852 to 1869. On the latter date he met an untimely 

 death in his laboratory in connection with experiments 

 upon hydrofluoric acid (47, 434, 1869). 



It may be added, further, that one of the striking- 

 features about the Journal, especially in the earlier half 

 century of its existence, is the personal nature of many 

 of its contributions, which were very frequently in the 

 form of letters written to Benjamin Silliman or J. D. 

 Dana. This is perhaps but another reflection of the 

 extent to which the growth of the magazine centered 

 around these two men, whose wide acquaintance and 

 broad scientific repute made of the Journal a natural 

 place to record the new and interesting things that were 

 being discovered in science. 



The following list gives the names and dates of ser- 

 vice, as recorded on the Journal title pages, of the gen- 

 tlemen, formally made Associate Editors: 



Wolcott Gibbs (2) 11, 1851 to (3) 18, 1879 



Asa Grav " 15, 1853 " " 34, 1887 



Louis Ag-assiz " 16, 1853 " (2) 41, 1866 



Waldo I. Burnett " 16, 1853 " " 17, 1853 



George J. Brush " 35, 1863 " (3) 18, 1879 



Samuel W. Johnson " 35, 1863 " " 18, 1879 



