Among articles to appear in 

 early numbers of the Journal 

 of Geology are the following: 



The Lava Field of the Parana Basin, South America. 

 By Charles Lawrence Baker. 



The Physical Chemistry of the Crystallization and Mag- 

 matic Differentiation of Igneous Rocks. VI. By 

 J. H. L. VOGT. 



Origin of the Triassic Trough of Connecticut. By W. G. 



FOYE. 



The Problems of the Anorthosites and Other Monomineral 

 Igneous Rocks. By F. Loewinson-Lessing. 



In Support of Gardner's Theory of the Origin of Certain 

 Concretions. By Leroy Patton. 



The Pleistocene History of the Lower Wisconsin River. 

 By Paul MacClintock. 



Mud Cracks on Steeply Inclined Surfaces. By Gerald 

 R. MacCarthy. 



The Cycle of Erosion and the Summit Level of the Alps. 

 By W. M. Davis. 



Some New Features in the Physiography and Geology of 

 Greenland. By Lauge Koch. 



