^ 



CENTHAL PARK, 

 A NEW YORK. a- 



POPULAE SCIENCE 



MONTHLY. 



CONDUCTED BY E. L. YOUMANS. 



VOL. III. 



MAY TO OCTOBER, 1873. 



NEW YORK: 



D. APPLETON AND COMPANY, 



549 & 551 BROADWAY. 

 1873. 



