SEXUAL TENDENCIES IN MONKEYS 299 



Southern California, Montecito is not entirely free from frost, 

 but the winters are so mild that when the orange and lemon 

 growers far to the south of us are compelled to use artificial heat 

 in their orchards to prevent damage by frost, our local growers 

 find it unnecessary to take any precautions whatsoever against 

 the cold. The climate here is therefore exceptionally mild, even 

 for Southern California, and at no times seems to reduce the 

 activities of macaques — except, of course, when rain drives them 

 to shelter. My subjects have always been in excellent physical 

 condition, the only deaths having been due to accident or to 

 pathological causes that were operative at the time of an animal's 

 purchase. 



In front of the laboratory is a quadrangular yard, 16.7 meters 

 long by 7.4 meters wide. The laboratory encloses one end of 

 this yard, and the cage one side. The other end and side of the 

 yard is enclosed by a solid board fence which is 1.9 meters high. 

 The entire enclosure is surrounded by live oak trees, and one 

 tree is contained within the yard. The animals, when at large, 

 could wander to an indefinite distance from the laboratory by 

 passing from tree to tree, but they rarely wander out of sight of 

 the yard. 



The cage is 6 meters high, 16.7 meters long and 1.8 meters 

 wide. The front, top and upper half of the rear and ends are 

 covered with wire netting, the meshes of which are 1.4 centimeters 

 square. The lower half of the rear and ends is solidly boarded, 

 to give stability to such a tall, narrow structure. The cage is 

 subdivided into eleven compartments by partitions of which the 

 lower one third is wood and the upper two thirds wire netting 

 (1.4 cm. mesh). Within 72 centimeters of the top of each com- 

 partment is a horizontal shelf, 30 centimeters wide. Each com- 

 partment is also equipped with a sleeping box, a food drawer, 

 and proper drainage for the concrete floor. A door at the rear 

 gives access to the man who cleans the cage. 



An important accessory to the cage is a wooden alley, which 

 extends along the entire rear of the structure, midway between 

 the top and bottom. This alley is 75 centimeters high by 60 

 centimeters wide. Each compartment opens into the alley by 

 means of a sliding door arrangement, which enables the observer 

 to make it accessible to the occupants of one or more compart- 

 ments, according to the demands of a given experiment. 



