Vol. LVL] Established by Edward L. Youmans. [No. 4. 



APPLETONS' ^""^^ 



POPULAR SCIENCE 



MONTHLY. "^.^^ 



g R A H 

 EDITED BY WILLIAM JAY YOUMA^SS. \i^\ "^'^^^ J^ 



FEBRUARY, 1900. ^^*^ . «^ ^>^ 



PASS 



South Sea Bubbles in Science. Prof. John Teowbridge. 401 



What makes the Trolley Car go. II. (Illustrated.) William Baxter, Jr., C. E. 408 



Is the Christian Religion Declining 1 Eev. Charles Augustus Briggs, D. D. 423 



A Century of Geology. Prof. Joseph Le Conte. 431 



The Applications of Explosives. (Illustrated.) Prof. Charles E. Munroe. 444 



A Year's Progress in the Klondike. (Illustrated.) Prof. Axgelo Heilprin. 455 



Decline of Criminal Jurisprudence in America. Gino C. Speranza, 466 



The Blind Fishes of North America. (Illustrated.) Prof. Carl H. Eigenmank. 473 



The Man of Science in Practical Affairs. Prof. F. W. Clarke. 487 



Forenoon and Afternoon. Charles F. Dowd, Ph. D. 493 



President Jordan's "Neminism." A. Pangloss. 494 



Correspondence : Faith and Knowledge. — Fiske's Views compared. — The Location of 



Vinland 497 



Editor's Table : The War Spirit.— Language and Life 501 



Fragments of Science 505 



D. APPLETON AND COMPANY. 



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