of the normal course of embryogenesis. Baer devoted much 

 more time in Petersburg to geographical investigations, 

 however, and he made a number of trips, with great difficulty, 

 to Nova Zembla, to Chudov Lake, to the Volga, and to the 

 coast of the Black and Caspian seas. From 1841 to 1852 

 Baer was a professor of anatomy and physiology in the 

 Medical-Surgical Academy, giving much attention and time 

 to his teaching activities. He also performed considerable 

 work as director of the library of the Academy of Science. 

 In the summer months of 1845 and 1846, Baer travelled to the 

 Mediterranean (Genoa, Venice and Trieste) , where he again 

 studied embryology and made a number of interesting observations 

 on the development of marine invertebrates. 



Many times Baer gave public lectures and speeches. 

 Among the latter, the speech entitled "A View of the 

 Development of Science" given to the Academy of Science in 

 1836 had considerable importance. Similarly important was 

 his speech, "The Correct View on Living Nature and the 

 Application of This View to Entomology," given May 10, I860 

 at the opening of the Russian Entomological Society, of 

 which Baer was first President. These two speeches and 

 others were later included in two collections of speeches 

 and articles. 11 



In 1862 Baer retired and was selected a member of honor 

 in the Academy of Science. On August 18, he solemnly 

 celebrated the fifty-year jubilee of receiving his doctoral 

 degree. The hero of the anniversary, then seventy- three 

 years old, gave a concluding speech at the ceremony 

 interspersed with jokes. He invited all the participants 

 to his next jubilee after another fifty years. 



In 1867 Baer arrived in his native university city of 

 Dorpat. Being unburdened there by any official responsibi- 

 lities, he gave himself up to literary work by commenting 

 on current biological science, particularly Darwin's theory, 

 which already had received wide distribution. He also 

 continued some historical work. 



11. Baer, REDEN , GEHALTEN IN WISSENSCHAFTLICHEN 



VERSAMMLUNGEN UND KLEINERE AUFSATZE VERMISCHTEN 



INHALTES. Part I: REDEN, GEHALTEN IN WISSENSCHAFTEN 



VERSAMMLUNGEN, pp. vi + 296. Part II:STUDIEN AUS DEM 



GEBIETE DER NATURWISSENSCHAFTEN , pp. xxv + 480. 



Braunschweig, 1886. 



y 281 



