American jj5atttre Series; 



Group IV. Working with Nature 



THE 



FRESHWATER AQUARIUM 



AND ITS 



INHABITANTS 



A GUIDE FOR THE AMATEUR AOUARIST 



BY 



OTTO EGGELIXG 



AND 



FREDERICK EHRENBERG 



WITH MANY ILLUSTRATIONS FROM NATURE 



NEW YORK 



HENRY HOLT AND COMPANY 



1 90S 



