Vol. LVL] Established by Ed wijija . L._ KcmMASfsr : ' ; , _ ^ ^ W^» 



APPLETONS'V.^M# 



POPULAR SCIENCE 



MONTHLY. 



EDITED BY WILLIAM JAY YOUMAJ^S. 



JANUARY, 1900. \ iS^AJ^'^^N:. 



Advance of Astronomy in the Nineteenth Century. 



Sir Robert Ball. 289 



The Applications of Explosives. (Illustrated.) Prof. C. E. Munboe. 300 



A Paradoxical Anarchist. (Illustrated.) Prof. Cesare Lombroso. 312 



What makes the Trolley Car go. (Illus.) William Baxter, Jr., C. E. 316 



Woman's Struggle for Liherty in Germany. Mary M. Patrick, Ph. D. 328 



Scenes on the Planets. (Illustrated.) Garrett P. Serviss. 337 



Professor Ward on ** Naturalism and Agnosticism." 



Herbert Spencer, 349 



Destructive Effects of Yagrant Electricity. (Illustrated.) 



Hubert S. Wynkoop, M. E. 357 



Winter Birds in a City Park. (Illustrated.) James B. Carrington. 366 



Old Rattler and the King Snake. President David Starr Jordan. 371 



Remarkable Yolcanic Eruptions in the Philippines. R. L. Packard. 374 



The Scavengers of the Body. M. A. Dastre. 379 



Editor's Table : Liberal Education and Democracy. — External and Internal 



Aggression 385 



Fragments of Science 388 



NEW YORK: 

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Copyright, 1899, bt D. APPLETON AND COMPANY. 

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