This page has been validated.
THE
POPULAR SCIENCE
MONTHLY.
CONDUCTED BY E. L. AND W. J. YOUMANS.
VOL. XXI.
MAY TO OCTOBER, 1882.
NEW YORK:
D. APPLETON AND COMPANY,
1, 3, and 5 BOND STREET.
1882.
THE
POPULAR SCIENCE
MONTHLY.
CONDUCTED BY E. L. AND W. J. YOUMANS.
VOL. XXI.
MAY TO OCTOBER, 1882.
NEW YORK:
D. APPLETON AND COMPANY,
1, 3, and 5 BOND STREET.
1882.