190 Bulletin Wisconsin Natural History Society [Vol. 13, No. 4 
Fig. 1. Showing the Box in Which the Turtles were Kept, and 
in Which the Experiments Were Performed. One Turtle is 
on the Zinc Plate in the Center Waiting to be Fed. The Feeding 
Stick is Shown at the Right. The Coil on the Right Side was Only 
Put in the Box so That it Might Appear in the Picture, and Was 
Usually Kept Outside. 
3. 2. 4 ». 
Fig. 2. The Turtles, Chrysemys bellii, and C. cinera , Used for the 
Experiments. No. I, C. bellii , had a Shell If in., No. II, C. bellii, 2f 
in., No. Ill, C. cinera, 6f in.; No. IV, C. cinera, 2 in.; No. V, C. cinera , 
IN. 
