35 



one edge of the cover (Fig. 12, B) and the others were in two com- 

 panies on the base. 



a I 



Fig. 12 



Experiment 5753, Gum Camphor in Solution. — April 20, at 10: 35. 

 sand soaked with a saturated watery solution of gum camphor was 



/^nf^ end Ldnrae 



Iatv^c 



a 



"I 



Fig. 13 



placed at the center of a nest. The ants immediately left the vicinity, 

 some remaining under the edge of the cover and the remainder escap- 



