37 



eighth distant. The general appearance is illustrated by the follow- 

 ing sketch (Fig. 14). At 9: 10 and 10:25 fewer ants were under the 



Fig. 14 



cover, and the circle formed by them was somewhat larger. At 1 : 30 

 the distance between the sand and the nearest ants was six-eighths of 

 an inch, and a few more had entered the nest. At 3 p. m. (6 hours, 40 

 minutes), about half the ants were under the cover, the nearest to the 



repellent being three-eighths to four-eighths of an inch away (Fig. 

 15). Two ants were seen to touch the sand with no ill effects. Ex- 

 periment closed. 



