ri6TOI5E-5TODY 5EVj 



% Devoted to Elementary Science 



in 



Nature- 

 Study 

 Society 



DECEMBER, 

 1920 



Vol. 16 No. 9 



Whole No. 140 



20c a copy 



Photo by A. A. Allen 



A Canvasback 



$1.60 a year 



