282 .4 Manual of Veterinary Physiology. 



which the injury has been inflicted, or else circus move- 

 ments or somersaults are performed. 



Cerebrum. 

 It has been considered that the larger the proportion 

 between the weight of the body and that of the brain, the 

 less the intelligence. 



In Man the weight of the brain is to the body as 1 to 36 

 » D °g » „ „ „ 1 „ 305 



» Shee P i) „ » „ 1 „ 350 



» Hor se „ „ „ „ 1 „ 4(10 



„ Elephant „ „ „ „ 1 „ 500 



» 0x » » „ „ 1 „ *G0 



(Colin.) 



This rule is not absolutely true. There is considerable 

 difference between the intelligence of a dog and a sheep. 

 A horse is nothing like so intelligent as an elephant, and he 

 is certainly not twice as intelligent as an ox. Personally I 

 hold a very low opinion of the intelligence of a horse. 

 The height of his intellect is exhibited when his stomach is 

 his consideration. He takes an interest in the chase and 

 race, but place him in a position of danger, or under any 

 circumstance requiring the use of reasoning powers, and he 

 is not only useless, but often a dangerous lunatic. He 

 possesses, however, an excellent memory. 



The cerebrum is composed of grey and white matter, the 

 grey externally placed and thrown into convolutions. 

 These convolutions in the lower animals, at any rate the 

 horse, though well marked, are by no means regular in 

 their position or direction, thereby forming a great contrast 

 to the brain of man. The use of the convolutions is no 

 doubt to increase the surface of the brain, and the deeper 

 and more complex they are, the greater the intelligence of 

 the animal. In the horse the convolutions are compara- 

 tively very shallow. 



Motor Areas. — Until within a few years ago, the functions 

 assigned to the cerebrum were simply those of intelligence 

 and all the higher faculties ; but experiment has shown 

 that the grey matter of the cortex of certain convolutions, 



