Dr. A. D. Waller 



[Feb. 4, 



200 per cent, changes, which I cannot reproduce artificially by any 

 means I care to employ. 



7. But to return to our different classes according to sensitive- 

 ness. We classified people as positives and imaginatives according 

 as they exhibited greater response to fact or to fiction. Apart from 

 this criterion, we might undertake to arrange people as more or less 

 imaginative according as they give larger or smaller responses to 

 certain standard threats, as of a pin-prick or the lighting of a match. 

 High in the scale of imaginatives we not infrequently meet with 

 people who can at will either keep quiet, or think thoughts and see 



iOPM 



A 

 M 



/Z 



A A 

 <7# 



/A.M. 



Fig. 2.— Emotivity of A. M. W. during the air-raid on Whit- 

 sunday, 1918. (From the Lancet.) M indicates the time of the 

 first warning by maroons at 11 p.m. G indicates the commence- 

 ment of gun-fire. The duration of the disturbance was from 

 11.20 p.m. to 1.30 a.m. H marks the moment of maximum 

 alarm, when the swelling hum of approaching aeroplanes was 

 most audible. S indicates the second warning by siren at the 

 termination of the disturbance. The electrodes were transferred 

 from the left to the right hand at 12.5. The horizontal lines 

 D.N.-N.N. indicate the average normal day and night conduct- 

 ance of A. M. W., ascertained from other observations. 



visions and hear words of purely imaginary existence without objec- 

 tive physical substratum. It is very interesting to watch the 

 galvanometric signs of subjective phenomena — interesting to the 

 onlooker, but far more interesting to the subject who knows what he 

 (or she) is thinking about. And when it is realised that the galvano- 

 meter answers to one's thoughts and temper, it becomes quite an 

 absorbing pastime to sit quietly in an armchair and watch oneself 

 think as one watches the galvanometer move. 



8. The emotive response is liable to all manner of variations. It 

 varies in different individuals, and in the same individual it varies 

 with different states of mind and body. It varies in magnitude and 



