SIZE OF THE BRAIN. 



329 



stances, and appears to remain constantly the same. This is the 

 cause, why, in the cat, the weight of the encephalon compared with 

 that of the body has been stated as 1 to 156 by one comparative ana- 

 tomist ; and as 1 to 82 by another ; that of the dog as 1 to 305 by one, 

 and as 1 to 47 by another, &c. 



The following table, taken chiefly from Haller 1 and Cuvier, 2 exhibits 

 the proportion borne by the encephalon to the rest of the body, in man 

 and certain animals. 



Child, 6 years old 



Adult 



Gibbon 



Sapajous, from 



Apes 



Baboons 



Lemurs 



Bat (vespertilio) 



Mole 



Bear 



Hedgehog . 



Fox 



Wolf 



Beaver 



Hare 



Rabbit 



Rat 



Mouse 



Wild Boar . 



Domestic do. 



2*2 



4V 

 T*I 



S'B 

 5-r 



A 



225 



T 



to 



A 



5^2 



5T2 



Elephant . 



Stag 



Roebuck (young) 



Sheep 



Ox 



Calf 



Horse 



Ass 



Dolphin 



Eagle 



Goose 



Cock 



Canary Bird 



Humming Bird 3 



Turtle 



Tortoise . 



Frog 



Shark 



Pike 



Carp 



sii to T J 2 

 7iu to s Js 



- 2!? 



?J(J tO 4 Jc> 

 35> 5()? TTJ2 



224<J 



rh 



24^5 

 T3\>5 



In 9 males, between 27 and 50 years of age, who died immediately, 

 or within a few hours, after accidents, and other external causes of 

 death, and who had been previously in good health, Dr. John Reid 4 

 obtained the following results; the weight used being avoirdupois: 



Average weight of body (9 weighed) . . . 

 Average of encephalon (6 weighed) . . . 

 Average of cerebellum (4 weighed) . . . 

 Average of cerebellum with pons and medulla 



(5 weighed) 



Or, taking the average of the four cases only 



in which the cerebellum was taken . . 

 Average of heart (9 weighed) 



Relative weight of body to encephalon (6 weighed) 

 Relative weight of body to heart (9 weighed) . . 

 Relative weight 'of encephalon to cerebellum (4 



weighed) as 1 



Relative weight of encephalon to cerebellum, with 



pons and medulla (5 weighed) as 1 to 



to 



9| 



2 Leons d'Anat. Comp., ix. art. 5. 



i Element. Physiol., x. sect. 1. 



3 On the authority of ex-President Madison. 



4 Lond. and Edinb. Monthly Journal of Med. Science, April, 1843, p. 322. 



