No. 537] NOTES AND LITERATURE 



575 



quantitatively ,-is qualitatively: and. finally, its sharp and clear 

 (•(inceptions of what is meant hy tropisms. hy differential sensi- 



I have referred to the "strongly nieelianieal tendency' 7 mani- 

 fest in Bohn's attitude toward behavior explanations. This is 



not to align Professor Holm with those representatives of the 

 extreme mechanical school, such as Beer. Bethe and Texkull. 

 Recognizing the great service of these men in showing "the 



explanations hold closely to those of the true mechanical school, 

 those who rely on tropisms and differential sensibility. Bohn is 

 highly appreciative of Loch's pioneer work, the work that indeed 

 marked the opening of the present epoch in animal psychology 

 study. The originality and genuinely Bahn-brcchend character 

 of Loeb's work is freely recognized. Indeed, the whole work and 

 activity of the present American school of animal psychology is 



Bohn's writings. 1 " 



