I87I.] 



on Psychic Force. 



489 



point c. Holes are cut in the side of the hoop to allow a 

 free passage of air to the under side of the membrane. The 

 apparatus was well tested beforehand by myself and others, 

 to see that no shaking or jar on the table or support would 

 interfere with the results : the line traced by the point c 



Fig. 10. (Settion.) 



on the smoked glass was perfectly straight in spite of all 

 our attempts to influence the lever by shaking the stand or 

 stamping on the floor. 



Experiment V. — Without having the object of the instru- 

 ment explained to her, the lady was brought into the room 

 and asked to place her fingers on the wooden stand at the 

 points L m, Fig. 9. I then placed my hands over hers to 

 enable me to detect any conscious or unconscious movement 

 on her part. Presently percussive noises were heard on the 

 parchment resembling the dropping of grains of sand on its 

 surface. At each percussion a fragment of graphite which 

 I had placed on the membrane was seen to be projected up- 

 wards about i-50th of an inch, and the end c of the lever 

 moved slightly up and down. Sometimes the sounds were 

 as rapid as those from an induction-coil, whilst at others 

 they were more than a second apart. Five or six tracings 

 were taken, and in all cases a movement of the end c of the 

 lever was seen to have occurred with each vibration of the 

 membrane. 



In some cases the lady's hands were not so near the 

 membrane as L M, but were at N o, Fig. 10. 



The accompanying Fig. 11 gives tracings taken from the 

 plates used on these occasions. 



