342. 



THE QUARTERLY REVIEW OF BIOLOGY 



essay was written and has not been used. Kohts's 

 studies (48), (49), have not been accessible to me 

 except through Yerkes' abstracts. They are rare in 

 this country, are in Russian except for a German 

 summary of (49), and evidently deserve to be 

 translated in full. On the subject of language, 

 Boutan (13), Furness (19), and Yerkes and Learned 

 (81) are conclusive. Learned's portion of the latter 

 is an objective record of chimpanzee utterances, 

 probably accurate as to pitch but inadequate in other 

 phonetic aspects. It is to be hoped that a phonetician 



can be interested in the subject. Similarly, on 

 strength, Bauman (10), (11) has opened a subject 

 which should be followed farther. Boutan*s work 

 (14), on mechanical problem solving by human 

 children, brings in also anthropoid observations, and 

 is marked by acuity and clarity of conception. 

 Brehm's Tierleben in its last edition, edited by 

 Neumann, (16), (17), reviews or quotes many of the 

 older accounts, which are often extremely illuminat- 

 ing. As regards Garner, I concur with Yerkes: he 

 knew his primates but misunderstood them. 



