APPLETONS' POPULAR SCIENCE MONTHLY
Reading edition
EDITED BY WILLIAM JAY YOUMANS
VOL. LV MAY TO OCTOBER, 1899
NEW YORK D. APPLETON AND COMPANY 1899
Copyright, 1899, By D. APPLETON AND COMPANY.
WILLIAM PENGELLY.
APPLETONS' POPULAR SCIENCE MONTHLY.
FEBRUARY, 1899.