110 PROCEEDINGS OF THE BOSTON MEETING 



Discussion on the basis of pre-Cambrian correlation. Journal of Geology, 

 volume 17, 1909, pages 118-122. 



Pre-Cambrian geology of North America. (With C. K. Leith.) Bulletin of 

 the United States Geological Survey, number 360, 1909, 939 pages. 



The conservation of natural resources in the United States. Macmillan Com- 

 pany, New York, 1910, 413 pages. 



The geology of the Lake Superior region. (With C. K. Leith.) Monograph 

 of the United States Geological Survey, number 52, 1911, 641 pages. 



The influence of applied geology and the mining indu^ry upon the economic 

 development of the world. International Geological Congress, XI, Stock- 

 holm, 1910, Compte-Rendu, pages 259-261, 1912. 



Concentration and control — a solution of the trust problem in the United 

 States. Macmillan Company, New York, 1912, 288 pages. 



Miscellaneous papers and addresses on public questions. 



TITLES AND ABSTRACTS OE PAPERS PRESENTED BEFORE THE MORNING 

 SESSION AND DISCUSSIONS THEREON 



The scientific program of the meeting was begun with a paper entitled 



FRAMEWORK OF THE EARTH 

 BY WILLIAM MORRIS DAVIS 



(Abstract) 



Opportunity for international correlation of geological investigation is 

 offered in connection with the further study of the "framework of the earth," 

 as already well developed in "Das Antlitz der Erde," by Suess, and in its 

 French translation, "La Face de la Terre," by de Margerie. As a means of 

 promoting such investigation, a summary of the points to which attention is 

 most needed would be helpful, and bibliographies of recent studies on each 

 element of the framework, published at intervals of a few years, would be an 

 additional aid. The suggestion was made that our Society invite de Margerie 

 to prepare such bibliographies for us to publish; and also that we urge de 

 Margerie, as the best qualified man, to prepare a critical summary of the 

 points in "La Face de la Terre" which, in his judgment, need revision and 

 extension. Such a summary would be an invaluable guide to future investi- 

 gators. 



The paper was presented without notes, with maps and diagrams. It 

 was discussed by Prof. Charles Schuchert. 



DISCOIDAL STRUCTURE OF THE LITH08PHERE ^ 

 BY BAILEY WILLIS 



Presented by title in the absence of the author. 



1 Presented before the Society on December 27, 1918, under the title "Structure of the 

 Pacific Ranges, California." Abstract published in Bull. Geol. Soc. Am., vol. 30, pp. 84-86. 



