Page:Popular Science Monthly Volume 39.djvu/7

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ESTABLISHED BY EDWARD L. YOUMANS.




 

THE

 

POPULAR SCIENCE

 

MONTHLY.






EDITED BY WILLIAM JAY YOUMANS




VOL. XXXIX.

MAY TO OCTOBER, 1891,




NEW YORK:
D. APPLETON AND COMPANY,

1, 3, and 5 BOND STREET.
1891.