CONTENTS XI 



Page 



Election of officers for 1922 223 



Presentation of papers 224 



Session of Thursday, December 29 225 



Presentation of papers 225 



Session of Friday, December 30 225 



Presentation of papers 225 



Proceedings of the Second Annual Meeting of the Mineralogical Society 

 of America, held at Amherst, Massachusetts, December 29, 1921 ; Her- 

 bert P. Whitlock, Secretary 227 



Session of Thursday, December 29, 1921 227 



Election of officers for 1922 227 



Report of the Secretary 228 



Report of the Treasurer 228 



Report of the Editor 228 



Report of the Committee on Nomenclature and Classification of 



Minerals 228 



Presentation of papers 229 



After-effects of igneous intrusion ; Presidential address by James F. Kemp 231 

 Some problems connected with the Dakota sandstone ; Presidential ad- 

 dress by Timothy W. Stanton 255 



Theory of isostasy — a geological problem ; by W. Bowie 273 



Condition of the earth's crust and the earlier American gravity observa- 

 tions ; by G. R. Putnam 287 



Some considerations touching on isostasy ; by H. O. Wood 303) 



Isostasy and earth movements ; by H. F. Reid 317 



Isostasy and applied geology ; by J. F. Kemp 327 



Folding of mountain ranges — the argument from isostasy ; by Sir Sidney 



P>urrard 333 



Isostatic compensation considered as a cause of thrusting; by A. C. 



Lawson 337 



Weight of sedimentary rocks per unit of volume ; by A. C. Lane 353 



Role of isostatic stress ; by B. Willis 371 



Isostasy and rock density ; by H. S. Washington 375 



Old and new standards of Pleistocene division in relation to the prehis- 

 tory of man in Europe ; by H. F. Osborn and C. A. Reeds 411 



Stages of the Ice Age ; by W. Upham 491 



Late Pleistocene history of the lower Mohawk and middle Hudson region ; 



by J. H. Stoller 515 



Kennecott glacier of Alaska ; by A. M. Bateman 527 



Map of the Pleistocene lakes of the Basin-and-Range province and its sig- 

 nificance ; by O. E. Meinzer 541 



Reconnaissance of the eastern Andes between Cochabamba and Santa 



Cruz, Bolivia ; by K. C. Heald and K. F. Mather 553 



Trenton of central Tennessee and Kentucky ; by P. E. Raymond 571 



Peneplains and the geographical cycle ; by W. M. Davis 587 



Variations or specific distinctions : which ? by R. S. Lull 599 



Volcanic ash bed in the Ordovician of Tennessee, Kentucky, and Alabama ; 



by W. A. Nelson 605 



Graphic study of igneous rock series ; by F. F. Grout 617 



