T H E 



POPULAE SCIEl^CE 



MONTHLY. 



CONDUCTED BY E. L. AND W. J, YOUMANS. 



VOL. XIV. 



NOVEMBER, 18V8, TO APRIL, 1879. 



NEW YORK : 

 D. APPLETON AND COMPANY, 



549 & 551 BROADWAY. 

 1879. 



