METHODS OF EXHIBITING REACTIVE TENDENCIES 



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All stock should be planed on both sides, and the apparatus 

 should be given two or three coats of dark gray paint, if it is 

 to be exposed to the weather. If, instead, it is to be used in- 

 doors, it should be painted white or gray, according to the 

 degree of illumination of the experiment room. 



The walls of the reaction chamber should be made of wire 

 netting of the weight indicated above. The outer walls of the 

 alleys may be made of wood or wire netting. The release box 

 should be built of wood except for the wire netting cover and 

 door. The entrance and exit doors should be made of wood. 8 



In table 1 are presented the chief dimensions for the three 

 sizes of apparatus under consideration. 



Table 1 



Principal Dimensions in Centimeters or Inches of 

 Convertible Reactive Tendency Apparatus 



Measurements Dimensions Dimensions . Dimensions 



for for for 



Of reaction boxes Small Medium Large 



Width outside 10 cm. 30 cm. 60 cm. 



Width inside (minimum) 7.5 cm. 25 cm. 51 cm. 



Length outside 30 cm. 60 cm. 140 cm. 



Length inside 29- cm. 58- cm. 135- cm. 



Depth outside 20 cm. 40 cm. 200 cm. 



Depth inside 19+ cm. 38+ cm. 198- cm. 



Of entrance and exit doors 



Width 8.4 cm. 27 cm. 54 cm. 



Length 2.0 cm. 40 cm. 200 cm. 



Of release box 



Width 33+ cm. 99+ cm. 198+ cm. 



Length 30 cm. 60 cm. 140 cm. 



Depth 20 cm. 40 cm. 200 cm. 



Of release box doors 



Width 10 cm. 30 cm. 60 cm. 



Length. 20 cm. 40 cm. 200 cm. 



3 For details see Behavior Monographs, vol. 3, no. 1, p. 14. 



4 



