ARCHITECTURE. 



203 



TABLE 47. SHOWING THE RELATIONS BETWEEN THE FRESH 

 WEIGHT OF THE HEMISPHERES AND THAT OF THE CORTEX. 

 BASED ON THE DIRECT MEASUREMENTS OF H. WAGNER. 



The average thickness of the cortex is taken to be 2*9 mm. 

 The weights are therefore proportional to the area. 



The weight is a much more manageable measure- 

 ment than the area, and has therefore been employed 

 in the tables. In normal persons the average thick- 

 ness of the cortex is not open to wide variations, 

 and hence the weights are proportional to the area. 

 With these observations are to be compared those made 

 by Calori on Italian subjects. 1 His results are sum- 

 marised in the following table (48), which indicates that 

 the weight or extent of the cortex in the male is greater 

 than in the female, and also that when the brachy- 

 cephalic individuals are compared with the dolico- 

 cephalic, the former are found to possess the greater 

 mass of cortex. Finally, under the direction of Giacomini, 

 De Regibus determined the area of the cortex by the 

 last method mentioned above. I have compiled from his 

 figures the accompanying table (49), but used for their 

 reduction constants slightly different from those which 

 he employed, thus obtaining, I believe, more correct 

 results, again expressed as weights. 



1 Calori, Mem. della Accad. della Sc. del? instituto di Bologna, 

 1870. 



