112 THE POPULAR SCIENCE MONTHLY. 



Paris, records the instance of a young man who one morning heard 

 himself addressed by name, and yet he could not see his interlocutor. 

 He replied, however, and a conversation followed, in the course of 

 which his ghostly visitant informed him that his name was M. Gab- 

 bage. 



After this occurrence he frequently heard M. Gabbage speaking to 

 him. Unfortunately, M. Gabbage was always recommending him to 

 perform very outrageous acts, such as to give an overdose of chloro- 

 dyne to a friend's child, and to jump out of a second-floor window. 

 This led to the patient being kept under observation, and it was found 

 that he was suffering from a one-sided hallucination. Similar cases 

 have been recorded in which disease of one sensory perceptive area has 

 produced unilateral hallucination. 



I can not see that these cases in any way support the notion of the 

 duality of the mind. On the contrary, they go to show that while as 

 a rule the sensory perceptive areas are simultaneously engaged upon 

 one object, it is still possible for one only to be stimulated, and for the 

 mind to conclude that the information it receives in this unusual way 

 must be supernatural, and at any rate proceeding from one side of the 

 body. 



To conclude, I have endeavored to show that as a rule both cere- 

 bral hemispheres are engaged at once in the receiving and considering 

 one idea ; that under no circumstances can two ideas either be con- 

 sidered or acted upon attentively at the same moment ; that there- 

 fore the brain is a single instrument. 



It now appears to me that one is justified in suggesting that our 

 idea of our being single individuals is due entirely to this single action 

 of the brain. 



Laycock showed that the Ego was the sum of our experience, and 

 every writer since confirms him. But our experience means (1) our 

 perception of ideas transmitted and elaborated by the sensory paths of 

 the brain ; and (2) our consciousness of the acts we perform. If, now, 

 these things are always single, the idea of the Ego surely must also be 

 sinijle. — Nature. 



nOME-LIFE OF THE THIBETANS.* 



By CHAELES H. LEPPER. 



THIBET ! how little does the name of that unexplored and jeal- 

 ously exclusive country convey to the average European ! To 

 the scientific it is known as the most extensive and highest table-land 

 in the world, the water-parting from whence the majority of the 

 largest and longest rivers in the world derive their sources. It is also 



* From an article on Thibet in the " Nineteenth Century." 



