202 SOCIAL EyOLUTION 



GiDDiNGS, F. H. — Descriptive and Historical Sociology. 



GiDDiNGS, F. H. — Democracy and Empire. 



GuMPLOWicz, L. — The Outlines of Sociology. 



Le Bon, G. — The Crowd. 



McDouGALL, W. — An Introduction to Social Psychology. 



Ross, E. A. — Social Control. 



Sumner, W. G. — Folkways. 



Tarde, G. — The Laws of Imitation. 



