28 ELEMENTS OF BIOLOGY 



Wendt, G., and Smith, O. P.: Matter and Energy. Vol. L P. Blakiston's 



Son and Company, Inc., 1930. 

 Covvdry, E. V. (Editor): General Cytology. Section V. University of 



Chicago Press, 1924. 

 Wilson, E. B.: The Cell in Development and Heredity. Chapter i. The 



Macmillan Company, 1925. 



