. The Journal of comparative neurology and psychology. testing the range andfineness of this sense. The tests as originally planned are not com-pleted. One of the animals was accidentally killed, and the work onthe other was stopped by reason of the experimenters removal toa distant locality. It is probably better to look upon these resultsas being qualitative and preliminary rather than to consider themas being standards quantitatively determined. The apparatus was constructed as follows: Two galvanized ironboxes (A and B, Fig. 5) were made with outside dimensions of9 X 9 X 24 inches. They we
. The Journal of comparative neurology and psychology. testing the range andfineness of this sense. The tests as originally planned are not com-pleted. One of the animals was accidentally killed, and the work onthe other was stopped by reason of the experimenters removal toa distant locality. It is probably better to look upon these resultsas being qualitative and preliminary rather than to consider themas being standards quantitatively determined. The apparatus was constructed as follows: Two galvanized ironboxes (A and B, Fig. 5) were made with outside dimensions of9 X 9 X 24 inches. They were built like square-sided pipes, asshown in the drawing, the inner opening being 5x5 inches andrunning the entire length of the box. The space between the outerand inner jackets was two inches deep and entirely enclosed thecentral cavity with the exception of the ends. This enclosed spacewas supplied with three vents, an inlet (I), an outlet (O) for thewater supply, and an air vent (V) to relieve the pressure when YoAKUMj Behavior of Squirrels. 56,. Fig. 5. 562 Journal of Comparative Neurology and Psychology. water was admitted to the vessel, or when the vessel was third vent was not needed so long as the circulation of waterwas constant. The outlet was placed at the bottom of the encirclingjacket and brought to a level with the upper part of the thus, it could be used to siphon all the water out, which notonly prevented the possibility of rust, but also at the same timeafforded the opportunity for beginning work immediately on sub-sequent days, by eliminating the necessity of heating a large bodyof cooled water in the jackets. In the bottom of each of these 5x5 inch inner passages smallcubical pans were sunk flush with the floor to a depth of one pans served as food receptacles. They were placed near theend farthest from the opening used as an entrance for the animal(thus avoiding any possibility of the use of vision). The back ofeach box
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