Vol. LIY.J Established by Edward L. Youmans. 



IUMANS. [NO. 4. 



State r iky 



APPLETONS'£2< 

 POPULAR SCIENC 

 MONTHLY. m2 





FEBRUARY, 1899. ^'llt* ' 



EDITED BY WILLIAM JAY YOUMANS. 



CONTENTS. PAGE 



I. Vegetation a Remedy for the Summer Heat of Cities. By Stephen 



Smith, M. D., LL. D 433 



II. Mivart's Groundwork of Science. By Prof. Wm, Keith Brooks . . 450 



III. The Science of Observation. By Charles Livy Whittle. (Ulus.). 456 



IV. Death Gulch, a Natural Bear-Trap. By T. A. Jaggar, Jr. (Illus.) . 475 

 V. The Labor Problem in the Tropics. By W. Alleyne Ireland . . . 481 



VI. Principles of Taxation. XX. The Law of the Diffusion of Taxes. 



Part II. By the Late Hon. David A. Wells 490 



VII. The Great Bombardment. By Charles F. Holder. (Illustrated.) 506 



VIII. The Spirit of Conquest. By J. Novicow 518 



IX. A Short History of Scientific Instruction. II. By Sir J. N. Lockyer. 529 



X. The Series Method : a Comparison. By Charlotte Taylor 537 



XL The Earliest Writing in France. By M. Gabriel de Mortillet . . 542 



XII. Sketch of Gabriel de Mortillet. (With Portrait.) 546 



XIII. Correspondence : The Foundation of Sociology.— Evolution and Education 



again. — Emerson and Evolution 553 



XIV. Editor's Table : The New Superstition.— Emerson 557 



XV. Scientific Literature 559 



XVI. Fragments of Science 569 



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Copyright, 1899, by D. APPLETON AND COMPANY. 

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