PLATE 2 
A. —A simple wire-mesh cage in a sand pan, with nest box, food and water dishes, 
and a vertical hollow wheel for exercise, makes comfortable quarters for mice and is 
easily cared for. The top is hinged so as to open upward. 
B. —A small, quarter-inch wire-mesh cage containing nest box and water dish on 
^helf, a revolving disk for exercise, and sand and food dishes on the floor, will ac¬ 
commodate one mouse very comfortably and can be connected by side doors With 
other cages. 
C. —Tracks of a meadow mouse trotting over a thin layer of white flour; about nat¬ 
ural size. 
