SIXTEENTH REPORT 



OF 



THE MICHIGAN ACADEMI OF SCIENCE 



PREPARED UNDER THE DIRECTION OF THE 



COUNCIL 



BT 



RICHARD DEZEEUW 



SECRETARY 



KirrANlCAL 



BY AUTHORITY 



LANSING, MICHIGAN 

 WYNKOOP HALLENBECK CRAWFORD CO., STATE PRINTERS 



1914. 



