APR 1 5 1931 -- w^ 



TRANSACTIONS OF THE 

 WAGNER FREE INSTITUTE 



OF SCIENCE RECEIVED ^ 



OF PHILADELPHIA Z 'f , 



'LIBRARY OF T"E ^ 



PEA30DY MUSEUM 



VOL. IX— PART I 

 MAY, 1919 



THE VEGETATION OF THE HACKENSACK MARSH 

 A TYPICAL AMERICAN FEN 



By 

 John W. Harshberger and Vincent G. Burns 



WAGNER FREE INSTITUTE OF SCIENCE 



MONTGOMERY AVE. AND SEVENTEENTH ST. 



PHILADELPHIA 



