THE 



POPULAE SCIENCE 



MONTHLY. 



CONDUCTED BY E. L. AND W. J. YOUMANS. 



VOL. XXII. 



NOVEMBER, 1882, TO APRIL, 1883. 



NEW YORK : 

 D. APPLETON AND COMPANY. 



1, 3, and 5 BOND STREET. 

 1883. 



