OUR FRIENDS AND 

 OUR FOES OF THE 

 INVISIBLE WORLD 



HOW TO WOO THE FRIENDS 

 HOW TO CONQUER THE FOES 



BY 



HARVEY HERSEY, A.B., A.M. 



WITH ONE HUNDRED AND SIXTEEN 

 ILLUSTRATIONS 



NEW YORK 



THE NEALE PUBLISHING COMPANY 

 1913 



