Established by Edward L. Youmans
APPLETONS'
POPULAR SCIENCE
MONTHLY
EDITED BY
WILLIAM JAY YOUMANS
VOL. LIV
NOVEMBER, 1899, TO APRIL, 1900
NEW YORK
D. APPLETON AND COMPANY
1900
Copyright, 1900,
By D. APPLETON AND COMPANY.
GEORGE M. STERNBERG.