170 THE HUMAN SPECIES 



In the tiger and lion i 5oo(-6oo) 



ox i 5oo(-8oo) 



gadus lota . . . . i 720 



ostrich i 1,200 



land turtle . . . . i 2,240 



shark i 2,496 



sea turtle i 5,680 



tunny . i 37,440 



The comparatively great weight of the brain of small singing 

 birds and of the small apes and monkeys is very striking, but 

 it has been ascertained that in man also small, light individuals 

 possess relatively heavy brains. From the above scale it is 

 clear that man does not possess the heaviest brain in proportion 

 to the weight of his body, nor has he, as Aristotle taught, even 

 the greatest quantity of brain in proportion to his size (Kara 

 //,e7eSo<?), for while in an adult woman i gm. of brain goes to 

 about 1*3- \'2 5 mm. of the whole stature, and in an adult 

 man i gm. to i'2$-i'2 mm., the elephant has i gm. of brain to 

 i'i8 mm. On the other hand, man stands at the head of the 

 animal kingdom as regards the weight of the brain in propor- 

 tion to the mass of the medulla spinalis, and in this respect 

 (according to the researches of Sommering, Tiedemann, Trevir- 

 anus, Meckel, etc.) possesses relatively the heaviest brain. 

 Mies l has ascertained that the proportion of brain to i gm. of 

 medulla spinalis is : 



In a girl of i year and 14 weeks . 94*32 gm. 



boy 6 years . . 73-10 



girl 10 . . 68'8i 



youth i8| . . 49-13 



Mies has also carried out these investigations even more 

 extensively in man than in animals, and has found that 

 actually in this respect the difference between man and beast 

 is the greatest. Ranke was able to clearly establish this : he 

 states that the weight of the brain compared with that of the 

 spinal cord was : 



In man . . . . 50 to i 



the gorilla . . . 20 or 17 to i 



1 Deutsche med. Wochenschrift, 1897, Nr. 53, p. 152. 



