MENTAL LIFE OF MONKEYS AND APES 7 



located and built in a grove of live oaks. From the front it is 

 well shown by figure 10 of plate III, and from the rear, by figure 

 11. Its location was in every way satisfactory for my work, 

 and in addition, the spot proved a delightful one in which to 

 spend one's time. 



Figure 12 is a ground plan, drawn to scale, of the laboratory 

 and the adjoining cages, showing the relations of the several 

 rooms of the laboratory among themselves and to the nine 

 cages. Although the construction was throughout simple, 

 everything was convenient and so planned as to expedite my ex- 

 perimental work. The large room A, adjoining the cages, was 

 used exclusively for an experimental study of ideational behavior 

 by means of my recently devised multiple-choice method. Addi- 

 tional, and supplementary, experiments were conducted in the 

 large cage Z. Room D served as a store-room and work-shop. 



The laboratory was forty feet long, twenty-two feet wide, 

 and ten feet to the plate. Each small cage was six, b^^ six, by 

 twelve feet deep, while the large compartment into which each 

 of the smaller cages opened was twenty-four feet long, ten feet 

 wide, and twelve feet deep. 



