PATUI5E-5TODY REVIEW 



% Devoted to Elementary Science in the} Schools 



OFFICIAL ORGAN 

 OF THE 



American 

 Nature- 

 Study 

 Society 



Photo by A. A. Allen 



A Canvasback 



DECEMBER, 

 1920 



Vol. 16 No. 9 



Whole No. 140 



20c a copy 



$1.50 a year 



