2 ROBERT M. YERKES 



mann, 1912). ' As a result of our correspondence, I was invited 

 to visit and make use of the facilities of the Orotava station 

 and to consider with its founder the possibility of cooperative 

 work instead of the establishing of an American station. This 

 invitation I gratefully accepted with the expectation of spend- 

 ing the greater part of the year 1915 on the island of Tenerife. 

 But the outbreak of the war rendered my plan impracticable, 

 while at the same time destroying all reasonable ground for hope 

 of profitable cooperation with the Germans in the study of the 

 anthropoids. In August, 1915, Doctor Rothmann died. Pre- 

 sumably, the station still exists at Orotava in the interests of 

 certain psychological and physiological research. So far as I 

 know, there are as yet no published reports of studies made at 

 this station. It seems from every point of view desirable that 

 American psychologists should, without regard to this initial 

 attempt of the Germans to provide for anthropoid research, 

 further the establishment of a well equipped American station 

 for the study not only of the anthropoid apes but of all of the 

 lower primates. 



In the early months of the war while I was making every 

 effort to obtain reliable information concerning conditions in the 

 Canary Islands, I received an urgent invitation from my friend 

 and former student, Doctor G. V. Hamilton, to make use of 

 his collection of anirmals and laboratory at Montecito, Cali- 

 fornia, during my leave of absence from Harvard. This invita- 

 tion I most gladly accepted, and in February, 1915, I established 

 myself in Santa Barbara, in convenient proximity to Doctor 

 Hamilton's private laboratory where for more than six months 

 I was able to work uninterruptedly under nearly ideal conditions. 



Doctor Hamilton without reserve placed at my disposal his 

 entire collection of animals, laboratory, and equipment, pro- 

 vided innumerable conveniences for my work, and in addition, 

 bore the entire expense of my investigation. I cannot ade- 

 quately thank him for his kindness nor make satisfactory ac- 

 knowledgment here of his generous aid. Thanks to his sympa- 

 thetic interest and to the courtesy of the McCormick family 

 on whose estate the laboratory was located, my work was done 

 under wholly delightful conditions, and with assistance from , 

 Ramon Jimenez and Frank Van Den Bergh, Jr., which was in- 



1 See bibliography at end of report. 



