DIFFERENCES IN MEN. 



563 



CHAPTER VII. 



ON THE INFLUENCE OF PHYSICAL AGENTS ON THE ASPECT AND FORM 

 OF MAN AND ON IHS INTELLECTUAL QUALITIES. 



Differences in Form, Habits, and Color of Men. Ideal Type of Man. Its Ascent and Descent. 

 ^-Causes of these Variations. 



Doctrine of the Unity of the Human Race. Doctrine of its Origin from many Centres. 



Influence of Heat on Complexion. Cause of Climate Variations. Influence of Heat illustrated 

 by the cases of the Indo-Europeans, the Mongols, the American Indians, and the Africans. 

 Distribution of Complexion in the Tropical Races. 



Variations in the Skeleton. Four Modes of examining the Skull. Connection of the Shape of 

 the Skull and Manner of Life. Physical Causes of Variation of the Skull. 



Influence of the Action of the Liver on Complexion. Influence of the Action of the Liver on the 

 Form of the Skull. Base Form of Skull arising from Low as well as High Temperatures. 

 Disappearance of the Red-haired and Blue-eyed Men in Europe. 



The Intellectual Qualities of Nations. Synthetical Mind of the Asiatic. Analytical Mind of the 

 European. Their respective Contributions to Human Civilization. Spread of Mohammedan- 

 ism in Africa. Spread of Christianity in America. Manner of the Progress of all Nations 

 in Civilization. 



THERE are great differences in the aspect of men. 



The portrait of Newton is from the frontispiece of his immortal Prin- 



Fifj. 266. cipia. " Does he eat, Differences in 



and drink, and sleep, * " f d 

 like other people ?" ask- men. 



Fig. 207. 



Sir Isaac Newton. Australian. 



ed the Marquis de I'Hopital, himself a great contemporary French math- 



