SOCIAL EVOLUTION 



SUPPLEMENTARY READINGS. 



BUCKLE, II. T. The History of Civilization in England. 



DEXTER, E. G. Weather Influences. 



HUNTINGTON, E. The Pulse of Asia. 



SEMPLE, E. C. The Influences of Geographic Environment. 



THOMAS, W. I. Source Book for Social Origins, Part I. 



FIGURE 61. A Bedouin Tent in the Desert. 



