28 



R. C. GESTELAND AND OTHERS 



Fig. 8. Two units show vigorous responses to ethyl butyrate and //-butanol. 

 Vigorous response of a different larger unit and one of the smaller units to 

 musk xylene. Weak response of the larger unit to geraniol. Sweep lengths, 



10 sec. 



Fig. 9. Two units of different amplitude are active in these three traces. One 

 responds to none of the three stimuli. The other responds vigorously to cou- 

 marin, and weakly or not at all to camphor and //-butanol. There is a continuous 

 difficulty of separating a weak response from the usual highly erratic resting 

 discharge rate. Sweep lengths, 10 sec. 



