Introductory material
Reading edition
NEW YORK: D. APPLETON AND COMPANY, 72 FIFTH AVENUE. Single Number, 50 Cents.Yearly Subscription, $5.00.
Copyright, 1898, by D. APPLETON AND COMPANY. Entered at the Post Office at New York, and admitted for transmission through the mails at second-class rates.
AUGUST VON KEKULÉ.
APPLETONS' POPULAR SCIENCE MONTHLY.
JANUARY, 1899.