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