Page:Popular Science Monthly Volume 19.djvu/7

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THE



POPULAR SCIENCE


MONTHLY.

 
 
 

Conducted by E. L. and W. J. Youmans.

 
 
 

VOL. XIX.

MAY TO OCTOBER, 1881.
 
 
 

NEW YORK:
D. APPLETON AND COMPANY,

1, 3, and 5 BOND STREET,

1881.