568 



SIZE AND WEIGHT OF THE BRAIN. 



towards the upper surface of the hemispheres, where they enter the superior 

 and inferior longitudinal sinuses : the veins of Galen, however, coming 

 from the lateral ventricles and choroid plexuses, run backwards to the 

 straight sinus. 



SIZE AND WEIGHT OF THE ENCEPHALON. 



In the following table illustrating the average weight of the adult male and female 

 brain, the results obtained by Sims, Clendinning, Tiedemann, and J. Reid have 

 been brought together in such a form as to exhibit in groups the most commonly 

 prevailing weight ; the numbers being also simplified by the omission of fractions. 

 (Sims, " Medico-Chirurg. Trans.," vol. xix., pp. 3537; Clendinning, "Medico- 

 Chirurg. Trans.," vol. xxi., pp. 59 68; Tiedemann, "Das Him des Negers," 

 Heidelberg, 1837, pp. 6, 7; Reid, "London and Edinburgh Monthly Journal of 

 Medical Science," April, 1843, p. 298, &c.) 



Table of the Average Weight of the Male amd Female Brain. 



According to this table, the maximum weight of the adult male brain, in a series of 

 278 cases, was 65 oz., and the minimum weight 34 oz. In a series of 191 cases, the 

 maximum weight of the adult female brain was 56 oz., and the minimum 31 oz. ; the 

 difference between the extreme weights in the male subject being no less than 31 oz., 

 and in the female 25 oz. By grouping the cases together in the manner indicated by 

 brackets, it is shown that in a very large proportion the weight of the male brain 



