. PRO ^l^E DINGS ,: 



'' OF THE 



AMERICAN PHILOSOPHICAL SOCIETY 



HELD AT PHILADELPHIA 

 FOR PROMOTING USEFUL KNOWLEDGE; 



Vol. XLVIII. January-April, 1909. No. 191. 



CONTENTS. 



Ceremonial Stones Used by the Australian Aborigines. By R. H. 



Mathews .' : i 



The Exploration of the Upper Air by Means of Kites and Balloons 



By William R. Blair 8 



Why America Should Re-explore Wilkes Land. By Edwin Swift 



Balch •. 34 



The Nation and the Waterways. By Lewis M. Haupt 51 



On ,a New Variety of Chrysocolla from Chilci By Harry F. 



Keller 65 



The Purification of Water Supplies by the Use of Hypochlorites. ' 



By William Pitt Mason...... 67 



The Detonation of Gun Cotton. By Charles E. Munroe. 69 



The Comparative Leaf Sti'ucture of the Strand Plants of New Jersey. 



By John W. Harshberger 72 



The Destruction of the Fresh-water Fauna in Western Pennsylvania. 



By A. E. Ortmann 90 



On Certain Generalizations of the Problem of Three Bodies. By 



Edgar Odell Lovett 11 1 



The Past History of the Earth as Inferred from the Mode of Forma- 

 tion of the Solar System. By T.J. J. See 119 



Commemorative Addresses and Obituary Notices of Members 

 Deceased. 



Personal Reminiscences of -Charles Darwin and of the Recep- 

 tion of the ** Origin of Species." By James Bryce /// 



II The Influence of Darwin on the Natural Sciences. By Geo ge 



Lincoln Goodale ■ xv 



The Influence of Darwin on the Mental and Moral Sciences. 

 By George Stuart Fullerton xx2' 



The World's Debt to Darwin. By Edwin G. Conklin xxxviii 



Richard Alexander Fullerton Penrose, M.D., LL.D hnii 



Daniel Coit Griman, LL.D. Ixii 



Minutes of Meetings from January i to May 21, 1909 i 



PHILADELPHIA 

 THE AMERICAN PHILOSOPHICAL SOCIETY 



' ' 104 South Fifth Street 

 1909 



