CHAP. XX.] OF THE HUMAN BTIAIN. 857 



between the two being at the rate of five per cent. ; i.e. 

 the brain of a tall man being represented by 100, that of 

 a man of short stature was 95. The difference in women 

 was a little less." This agrees pretty closely with 

 Marshall's more recent computations. 



Race. Comparatively few observations have as yet 

 been instituted in reference to this very large subject 

 viz. the question of the average or prevailing weight of 

 the Brain in different races of Men. More has been 

 done in this direction in regard to variations of ' cranial 

 capacity.' 



Some sort of commencement has, however, been made 

 towards ascertaining the average weight of Brain for the 

 English and Scottish, and, with less precision, that for 

 the French and German people. But the observations 

 made have, as yet, been obtained from too restricted 

 areas, and too much from persons of the same social and 

 educational status. 



Thurnam thinks that Welcker's estimate of 1390 

 grammes or 49 oz. represents the mean weight of male 

 European brains, in persons of twenty to sixty years 

 of age, with considerable accuracy, and he gives the 

 following table showing how the mean brain- weights 

 for the separate people above mentioned stand in regard 

 to it: 



EATIO OF BRAIN- WEIGHT OP DIFFERENT EUROPEAN PEOPLES. 



Males. Ounces. Grammes. Ratio of Brain- Weight 



Europeans (Welcker) . . 49 1390 . . 100 



English (Boyd) . . 47'8 1354 . 



(Peacock} . . 49 1388 . 



French (Parcliappe) . 47'9 1358 . 



Germans, &c. (Wagner). 48'3 1371 . 



Scotch (Peacock) ". . 50 1417 . 



