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THE
POPULAR SCIENCE
MONTHLY.
CONDUCTED BY E. L. AND W. J. YOUMANS.
VOL. XXIV.
NOVEMBER, 1883, TO APRIL, 1884.
NEW YORK:
D. APPLETON AND COMPANY,
1, 3, AND 5 BOND STREET.
1884.
COPYRIGHT, 1884,
BY D. APPLETON AND COMPANY.