THE NUMBERS OF MEN 



97 



distribution of world population over the land surface of the 

 earth. 



The area of the whole square is taken as that of the land area 



Total Land Area of the Earth 



AND 



Inhabitants per S'guARE Mile 



Fig. 19. Land area of the earth and population density. For further 



explanation see text. 



of the globe. The lower unshaded rectangle — the "great open 

 spaces" comprising roughly 81 per cent of the whole area — 

 has an average density of population of only about 9 persons 

 per square mile. The cross-hatched rectangle at the upper left 



