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THE
POPULAR SCIENCE
MONTHLY.
EDITED BY WILLIAM JAY YOUMANS.
VOL. XLII.
NOVEMBER, 1892, TO APRIL, 1893.
NEW YORK:
D. APPLETON AND COMPANY,
1, 3, AND 5 BOND STREET.
1893.
L.SOC. 170.46
COPYRIGHT, 1893,
BY D. APPLETON AND COMPANY.
3
RECEIVED.
OCT 29 1892