16 TEAITS OF YOUNG CHIMPANZEES 



Conditions for keeping and observing the chimpanzees 

 at the writer's country place were very nearly ideal and for 

 eight weeks work progressed steadily and satisfactorily. 

 The animals were housed in well ventilated, commodious 

 quarters and in favorable weather were given their freedom 

 for some hours each day in an adjoining pasture and birch 

 lot. 



On September 25 it was necessary to transfer them to 

 Washington, D. C, the winter location of the writer. There 

 they were necessarily housed more closely, suitable cage being 

 constructed in dwelling house with adjoining open-air porch, 

 to which the animals at their desire gained access at any hour 

 of the day. The indoor cage, measuring approximately 10 

 feet long, 8 feet wide, and 6 feet high, was equipped with 

 toilet, sleeping boxes, climbing ropes. 



The room temperature, maintained by a hot-water heater, 

 varied during the winter of 1923-1924 from 50° to 70°F; 

 60° was the temperature striven for. There was no indica- 

 tion whatever that a higher temperature, such for example 

 as ordinarily is maintained for anthropoid apes m zoological 

 gardens, is necessary or desirable for the young chimpanzee. 

 The animals spent much of their time on the open porch or 

 running back and forth between cage and porch. The male 

 even played in the snow, paying little attention it seemed to 

 the temperature, but fascinated by the unusual appearance 

 and feel of the substance. Only once during the period 

 covered by this report (August, 1923 to June, 1924) did either 

 of the animals show symptoms of coryza, and in that instance 

 they simultaneously developed an affection quite evidently 

 contracted from attendant, with sneezing, running of nose, 

 etc. This affection was mild and lasted not more than two or 

 three days. Recovery was complete as well as speedy. My 



