vi CONTENTS OF VOLUME IX 



PAGE 



Reviews: Three Phases of Modern Paleontology ; (i) Uintacrinus : Its Struc- 

 ture and Relations, by Frank Springer; (II) Oriskany Fauna of Becraft 

 Mountains, by John M. Clark ; (III) Stratigraphical Succession of the 

 Fossil Floras of the Pottsville Formation in the Southern Anthracite 

 Coal Field, by David White (Charles R. Keyes), 539; Iowa Geological 

 Survey, by Samuel Calvin, State Geologist ; A. G. Leonard, Assistant 

 State Geologist; Annual Report for 1900 (H. F. B.), 547 ; Beach Struc- 

 tures in the Medina Sandstone, by H. L. Fairchild (N. M. F.), 549 ; The 

 Beaufort's Dyke, off the Coast of the Mull of Galloway, by H. G. 

 Kinahan (N. M. F.), 551. 



Recent Publications - - - - - - - - - 55 2 



NUMBER VII. 



Individuals of Stratigraphic Classification. Bailey Willis - 557 



The Discrimination of Time-Values in Geology. Henry Shaler Williams 570 



Variations of Texture in Certain Tertiary Igneous Rocks of the 



Great. Basin. J. E. Spurr - - - - - - - - 586 



The Foyaite-Ijolite Series of Magnet Cove : A Chemical Study in 



Differentiation. Henry S.Washington - - - - - 607 



The Pre-Terrestrial History of Meteorites. Oliver C. Farrington 623 



Editorial ------------- 633 



Reviews : Zinc and Lead Region of North Arkansas, by John C. Branner 

 (C. R. Keyes), 634; Texas Petroleum, by William Battle Phillips 

 (C. E. S.), 637 ; Lessons in Physical Geography, by Charles R. Dryer 

 (N. M. F.), 638; Some Notes Regarding Vaerdal: The Great Landslip, 

 by Dr. Hans Reusch (N. M. F.), 639 ; Geological Map of West Virginia, 

 by I. C. White, 640. 

 Recent Publications --.----.-_ 642 



NUMBER VIII. 



The Foyaite-Ijolite Series of Magnet Cove : A Chemical Study in 



Differentiation, II. Henry S. Washington ----- 645 



Peculiar Effects Due to a Lightning Discharge on Lake Champlain 



in August, 1900. William Hallock ------- 671 



Study of the Structure of Fulgurites. Alexis A. Julien - - - 673 



Physiography of the Boston Mountains, Arkansas. A. H. Purdue - 694 



The Discovery of a New Fossil Tapir in Oregon. William J. Sinclair - 702 



The Formation as the Basis for Geologic Mapping. Edwin C. Eckel - 708 



