abstracts of papers 53 



Sessiox of Thursday Afterxoox 



The afternoon session was opened at 2.15 o'clock, with President Schu- 

 chert in the chair. The object of the symposium annomiced for this 

 session was briefly reviewed by the chairman, who called attention to the 

 fact that the presidential address given in the morning session is properly 

 a part of this "Symposium on the structure and history of mountains 

 and the causes of their development.'* 



TITLES OF PAPEUS PRESEXTKD 



SYMPOSIUM ON THE STRUCTURE AND HISTORY OF MOUNTAINS AND 'JMIi: 



CAUSES OF THEIR DEVELOPMENT 



tilTES AND NATURE OF THE SOUTH AMERICAN GEOi^YXCLIXEt< 

 PBESIDEXTIAL ADDRESS BY CHAULES SCHVCHERT 



THE THEORY OF MOUXTAIX iiTRUCTURE RECEXTLY ISET FORTH BY 

 PROFESSOR KOBER OF YTEXXA 



BY CHESTER R. LOXGWEEL ^ • 



Presented in full extemporaneously. 



ASIATIC ARCS 

 BY WILLIAM H. HOBBS 



Presented in full extemporaneously. 



THE APPALACHIANS 

 BY ARTHIR KEITH 



Presented in full from notes. 



EASTERX APPALACHIAXS IX THE LATITUDE OF SOUTHERX XE\Y EXGLAXI) 



BY J. E. WOODWORTH 



Eead by title. 



COAST RAXGES AXD SIERRA XEWADAS 

 BY BAILEY' WILLIS 



Presented in full extemporaneously. 



ROCKY MOUXTAIXS OF IDAHO AXD MOXTAXA 

 BY G. R. MANSFIELD 



Presented in full from notes. 



^ Introduced by Charles Schnc-hert. 



