RELATIONS WITH PROFESSORS. 53 



on botany. Martins gave, besides, his so- 

 called " Reise-CoUeg," in which he instructed 

 the students how to observe while on their 

 travels. Schelling taught philosophy, the ti- 

 tles of his courses in the first term being, " In- 

 troduction to Philosophy " and " The Ages 

 of the World " ; in the second, " The Philos- 

 ophy of Mythology " and " The Philosophy 

 of Revelation." Schelling made a strong im- 

 pression upon the friends. His manner was 

 as persuasive as his style was clear, and his 

 mode of developing his subject led his hear- 

 ers along with a subtle power which did not 

 permit fatigue. Oken lectured on general nat- 

 ural history, physiology, and zoology, includ- 

 ing his famous views on the philosophy of na- 

 ture (Natur-philosophie). His lectures gave 

 occasion for much scientific discussion, the 

 more so as he brought very startling hypoth- 

 eses into his physiology, and drew from them 

 conclusions which even upon his own showing 

 were not always in accordance with experi- 

 ence. " On philosophical grounds," he was 

 wont to say, when facts and theory thus con- 

 fronted each other, "we must so accept it." 

 Oken was extremely friendly with the stu- 

 dents, and Agassiz, Braun, and Schimper (who 

 joined them at Munich) passed an evening 



