AMERICAN JOUENAL OF SCIENCE 49 



was appointed Silliman professor of Geology in Yale 

 College. He was at this time actively engaged in writ- 

 ing his three quarto reports for the Expedition and 

 hence did not begin his active professional duties in Yale 

 College until 1856. Part of his inaugural address was 

 quoted on an earlier page. 



Dana had already performed the severe labor of pre- 

 paring the complete index to the First Series, a volume 

 of about 350 pages, finally issued in 1847. From the 

 beginning of the Second Series he was closely associated 

 with his brother-in-law, the younger Silliman. Later the 

 editorial labor devolved more and more upon him and the 

 larger part of this he carried until about 1890. His work, 

 was, however, somewhat interrupted during periods of ill 

 health. This was conspicuously true during a year's 

 absence in Europe in 1859-60, made necessary in the 

 search for health; during these periods the editorial 

 responsibility rested entirely upon the younger Silliman. 

 Of Dana's contributions to science in general this is not 

 the place to speak, nor is the present writer the one to 

 dwell in detail upon his work for the Journal. This sub- 

 ject is to such an extent involved in the history of geology 

 and zoology, the subjects of several succeeding chapters, 

 that it is adequately presented in them. 



It may, however, be worth stating that in the bibliog- 

 raphy accompanying the obituary notice of Dana (49, 

 329-356, 1895) some 250 titles of articles in the Journal 

 are enumerated; these aggregate approximately 2800 

 pages. The number of critical notes, abstracts, book 

 reviews, etc., could be also given, were it worth while, but 

 what is much more significant in this connection, than 

 their number or aggregate length, is the fact that these 

 notices are in a large number of cases like those of Gray 

 in botany minutely critical and original in matter. 

 They thus give the writer's own opinion on a multitude 

 of different subjects. It was a great benefit to Dana, as 

 it was to science also, that he had this prompt means at 

 hand of putting before the public the results of his active 

 brain, which continued to work unceasingly even in times 

 of health prostration. 



This may be the most convenient place to add that as 

 Dana became gradually less able to carry the burden of 



