362 



THE SIZE AND WEIGHT 



Any considerable number either of Skulls or Brains will 

 generally be found to contain representatives of three 

 artificial series into which it is convenient to divide them. 

 First, those of medium capacity or weight ; second, those 

 which are more or less decidedly small (microcephalous) ; 

 third, those which are more or less decidedly large (mega- 

 locephalous). For Brain-weights Thurnam has fixed upon 

 the following numbers, as those most expedient to adopt 

 in the separation of such classes from one another. 



This is a useful table, since it shows the wide range 

 of variation to be met with in the brain-weights both of 

 Men and of Women ; it may, however, be supplemented 

 by the conclusions of Dr. Sharpey as deduced from a 



mode of life, are accustomed to exercise their Intelligence in dif- 

 ferent degrees. The prevailing measurements show a distinct 

 decrease in the order of his four classes, whom he designates : — 

 1, Savants et lettres; 2, Bourgeois Parisiens; 3, Nobles d'au- 

 cicnnes families; i, DomestiqUes Parisiens." 



