350 NEKVOUS SYSTEM. 



vanced age of the person referred to, seventy-seven years, 

 would not account for the small weight of the brain, though 

 the weight is undoubtedly diminished in old persons. We 

 are not surprised, then, in the tables based upon observa- 

 tions of thousands of healthy brains of men not remarkable 

 for great intellect, to find many between fifty-five and sixty 

 ounces in weight. 



As the general result of all the observations upon the 

 human subject, while we admit that intellectual vigor is in 

 general coincident with large development of the cerebral 

 hemispheres, there are certainly many striking exceptions to 

 this rule when it is applied to individuals. 



Location of the Faculty of Articulate Language in a Re- 

 stricted Portion of the Anterior Cerebral Lobes. Physiolo- 

 gists are often slow to accept important facts bearing directly 

 upon the functions of parts, drawn exclusively from pathol- 

 ogy, especially when these facts are not capable of demon- 

 stration by experiments upon the lower animals ; and per- 

 haps this is due to a certain distrust of the accuracy of 

 pathological researches as compared with the exact results 

 of well-executed experimental observations. As regards the 

 faculty of speech, however, our study must be Confined to 

 man, the only animal capable of articulate language, and our 

 data are drawn exclusively from pathology. Some physio- 

 logical writers are still disposed to regard the location of 

 the faculty of speech as not definitively settled ; but, from a 

 careful study of the pathology of aphasia, we are convinced 

 that there is no point in the physiology of the brain more 

 exactly determined than that the faculty of speech is located 

 in a well-defined and restricted portion of the anterior lobes. 

 This is the more interesting and important, as it is the only 

 sharply-defined faculty that has been accurately located in a 

 distinct portion of the brain. 



"We do not propose to enter fully into the history of 

 aphasia, as this belongs to pathology. In the companion- 



