RECORDS OF MEETINGS OF 1907 319 



Evening Session. 



Brother Chrysostom, Space. 



Dickinson S. Miller, Imageless Thought. 



C. B. Bliss, An Inquiry after the Possible Relations be- 



tween THE Trinities of Psychology and 

 Theology. 



Cassius J. Keyser, Some Relations of Geometry to Psychology and 



Philosophy. 



Summary of Papers. 



Mr. Froberg gave the results of an experimental study of reaction time 

 as affected by the intensity, area and duration of the stimulus. He used 

 chiefly light stimuli, and found the reaction time to decrease as the inten- 

 sity, area or duration increased; as the magnitude of the stimulus increases 

 in a geometrical series, the time of reaction decreases in arithmetical pro- 

 gression. A given ratio of increase of intensity produces about twice as 

 much decrease in reaction time as does the same ratio of increase of area 

 or duration. In case of sound, also, increase of intensity brings decrease 

 of reaction time. 



Dr. Carr reported a case of incipient hysterical trance. The subject 

 was a young woman who, since the age of six years, following an attack 

 of t}^hoid fever, had been subject to recurring attacks of partial trance, 

 in which, though no unconsciousness, amnesia or alternation of personality 

 occurred, there was motor paralysis (without rigidity) and the following 

 peculiar visual experience. Objects appeared to move away, while re- 

 maining, at first, clear-cut and real; next they either remained in the dis- 

 tance or disappeared in a haze, or sometimes the whole visual field became 

 blank. Her feet, as she lay, seemed far away, and this visual illusion was 

 accompanied by the tactile illusion of being indefinitely long. Auditorily, 

 the experience was one of great quiet. The experience was terrifying, but 

 she was unable to struggle or cry out. The subject presented some fur- 

 ther symptoms of hysteria, and a comparison of her case with that of Helene 

 Smith leads to the view that only circumstances making the subject antag- 

 onistic to her trances and to occultism prevented her from developing into 

 a trance medium. 



Mr. RUdiger said in his paper that he has explored an area near the 

 center of clear vision by the tachistoscopic method, andfdetermined the 

 limits within which the letters *u' and *n,' of a certain type, can be dis- 

 tinguished 90 per cent, and also 75 per cent, of the time. There were 



