476 



BIOLOGY OF THE LABORATORY MOUSE 

 BOX TOP 



A. WIRE 

 4 strands 

 to the inch 



2 m m. opening 



gloss size 9mm. diam 



^ BASE 



5:" ply board 



MOUSE BOX 



with one side 

 remove d 



Fig. 171. — Design and measurements for mouse boxes, covers, hoppers, etc. 



