191 



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



popular" SCIENCE 



MONTHLY. 



AUGUST, 1893. 



EDITED BY WILLIAM JAY YOUMANS. 



CONTENTS. rAOB 



I. Studies of Animal Speech. By Prof. E. P. Evans 433 



II. Learn and Search. By Prof. Rudolph Virchow 440 



III. Protection from Lightning. By Alexander McAdie. (Illus.); 453 



IV. Success with Scientific and other Meetings. By George Iles . . 463 

 V. Professor Weismann's Theories. By Herbert Spencer 473 



VI. The Color Changes of Frogs. By Prof. C. M. Weed. (Illus.). 490 

 VII. Why a Film of Oil can calm the Sea. By G. W. Littlehales. 



(Illustrated.) 494 



VIII. How Plants and Animals Grow. By Dr. Manly Miles 503 



IX. The Revival of Witchcraft. By Ernest Hart. (Concluded.). 516 



X. Some Remarkable Insects. By William J. Fox. (Illustrated.). 527 

 XI. The Material View of Life and its Relation to the Spiritual. 



By Prof. Graham Lusk 533 



XII. Sealing in the Antarctic 539 



XIII. Honey and Honey Plants. By Dr. G. G. Groff 545 



XIV. Sketch of Paolo Mantegazza. By Prof. Frederick Starr. 



(With Portrait.) = 549 



XV. Editor's Table : A Great Work concluded 552 



XVI. Literary Xotices 554 



XVII. Popular Miscellany 565 



XVIII. Notes 575 



NEW YORK: 

 D. APPLETON AND COMPANY, 



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 Single Number. 50 Cents. Yearly Subscription, $5.00. 



Copyright, 1893, by D. APPLETON AND COMPANY. 

 Entered at the Post-Office at New York, and admitted for transmission through the mails at second-class rates. 



