Vol. XLIIL] Established by Edward L. Youmans. 



THE 



[No. 2. 



POPULAR SCIENCE 

 MONTHLY. 



JUNE, 1893. 



EDITED BT WILLIAM JAY YOUMANS. 



I. 



II. 



III. 



IV. 



V. 



VI. 



VII. 



VIII. 



IX. 



X. 



XI. 



XII. 



XIII. 



XIV. 



XV. 



XVI. 



XVII. 



XVIII. 



CONTENTS. rA0E 



Irrigation in the Arid States. By Charles II. Shixx. (Illns.). 145 

 The Inadequacy of "Natural Selection." By Herbert Spencer. 



(Concluded.) 1G2 



The Ceremonial Use of Tobacco. By Jonx Hawkins 173 



Ethnology of the Yuruks. By A. T. M. n' Anuria. (Illustrated.) 184 



Modern Miracles. By Prof. E. P. Evans 192 



The Phenomena'- of Death in Battle. By George L. Kilmer... 196 



The Revival' of Witchcraft. I. By Dr. Ernest Hart 206 



Adaptations of Seeds and Fruits. By J. W. Folsom 218 



Why Grow Old ? By Dr. N, E. Yorke-Davies 226 



Children's Questions. From the German 238 



East Central African Customs. By James Macdoxald. (Concl.). 240 



The Bay of Fundy Tides and Marshes. By Frank H. Eatox . . 250 



Sketch of Sir Archibald Geikie. (With Portrait.)* 257 



Correspondence : The First Transatlantic Steamer.— Food of the Garter Snake. 265 



Editor's Table : Social Problems 266 



Literary Notices 268 



Popular Miscellany 278 



Notes 286 



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