4 

 side of the hocfd was hinged to the table to prevent 



shifting out of position. Opposite the hinged side and 



about ten inches from the door of the latoh box was the 



entrance box of the hood. 



The maze (Fig. 2) was one not previously used in be- 

 havior work. The paths u Q.m t wide, were arranged in 

 oonoentrio Circles, separated from each other by vertical 

 partitions of sheet aluminum,I5 am. high. These alui i- 

 num strips were set in grooves in a circular wooden base, 

 152 o .m. in diameter, tfire netting in t7/o semi-circular 

 sections covered the paths and an additional circular 

 piece covered the center. The arrangement of the open- 

 ings to adjoining paths, and the cul de sacs are rather 

 difficult to describe. The placing of these can be bet- 

 ter understood by consulting Fig. 2. The distance from 

 the entrance to the center of the maze, when following a 

 direct line. was 37 • 



The inclined plane box (Flg.3),in general construct- 



