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THE
POPULAR SCIENCE
MONTHLY.
CONDUCTED BY E. L. and W. J. Youmans.
VOL. XVII.
NOVEMBER, 1880, TO APRIL, 1881
NEW YORK:
D. APPLETON AND COMPANY,
1, 3, and 5 Bond Street
1881.
THE
POPULAR SCIENCE
MONTHLY.
CONDUCTED BY E. L. and W. J. Youmans.
VOL. XVII.
NOVEMBER, 1880, TO APRIL, 1881
NEW YORK:
D. APPLETON AND COMPANY,
1, 3, and 5 Bond Street
1881.