Established by Edward L. Youmans
APPLETONS'
POPULAR SCIENCE
MONTHLY
EDITED BY
WILLIAM JAY YOUMANS
VOL. LVI
NOVEMBER, 1899 TO APRIL, 1900
NEW YORK
D. APPLETON AND COMPANY
1900
Copyright, 1900,
By D. APPLETON AND COMPANY.
FREDERICK C. SELOUS.