Page:Popular Science Monthly Volume 37.djvu/7

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ESTABLISHED BY EDWARD L. YOUMANS.


THE

POPULAR SCIENCE

MONTHLY.

EDITED BY WILLIAM JAY YOUMANS

VOL. XXXVII.

MAY TO OCTOBER, 1890.

NEW YORK:
D. APPLETON AND COMPANY,

1, 3, and 5 BOND STREET.
1890.