736 THE POPULAR SCIENCE MONTHLY. 



of Harvard, in the American Psychological Review the case of 

 John Bunyan. 



Lastly, there is one other curiosity of thinking which as yet 

 remains unexplained, but which at present is exciting a consid- 

 erable degree of interest. I refer to the condition known as 

 double consciousness. Let me give an illustration. 



A young man, a carpenter by trade, of fair intelligence and 

 good physique, had a severe fall upon the head in January, 1879, 

 and subsequently to that time suffered from occasional attacks of 

 unconsciousness with convulsions, which were thought to be epi- 

 leptic. He was treated from July, 1884, until January 10, 1885, 

 for this disease, and during that time had no attacks. On Janu- 

 ary 10th he came home from work as usual, ate his supper, and 

 went to bed. He slept with his brother, who is sure that during 

 the night he had no convulsion. The patient says that when he 

 woke up on the 11th of January he found himself in Bellevue 

 Hospital, and learned to his surprise that it was evening. He has 

 no recollection of anything which occurred beween going to bed 

 on Friday night and waking in the hospital on Saturday night. 

 From his family, however, it was ascertained that he got up as 

 usual on Saturday morning, and while it was noticed that he acted 

 a little strangely at breakfast nothing was said to him, and he went 

 as usual to work. His employer thought that his eyes looked 

 brighter (possibly his pupils were dilated) and that he did not ap- 

 pear natural, but he took no special notice of this, and soon after 

 his arrival at the shop in Twenty-fourth Street he sent him up to 

 a house in Forty-sixth Street (about a mile) on an errand, to 

 obtain a carpenter's bit and brace. He went up to Forty-sixth 

 Street, did the errand, and evidently explained himself intelligently, 

 for he was given the bit and brace. The next trace he has of his 

 movements was at Eighth Avenue, near Bleecker Street (about 

 two miles away), though how he got there he does not know. He 

 there went into a plumber's shop, and asked to be allowed to sit 

 down and rest. He had nothing in his hands, so must have lost 

 the bit and brace on the way. He soon got into a lively talk with 

 the plumber, and became quarrelsome, so that he was told to go 

 out. He went away, but in an hour came back, entered the shop, 

 and tried to strike the plumber. This was for him an unusual pro- 

 ceeding, as he is of a mild and gentle disposition. An officer was 

 summoned, who took him to the police station, where it was evi- 

 dent that he was out of his head ; so they sent him to St. Vincent's 

 Hospital, whence he was at once transferred to Bellevue. He fell 

 asleep soon after admission to Bellevue, and on waking in an hour 

 or so was surprised to find where he was. His manner of talking 

 made it evident that nothing was the matter with him, and he 

 was discharged at once and went home, rather indignant at hav- 



