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Establisbefc b£ Efcwarfc X. foumarts 



APPLETONS' 



POPULAR SCIENCE 

 MONTHLY 



EDITED BY 



WILLIAM JAY YOUMANS 



VOL. LII 



NOVEMBER, 1 897, TO APRIL, 1 898 



NEW YORK 

 D. APPLETON AND COMPANY 



1898 



