Among articles to appear in early 
numbers of the Journal of Geology 
are the following: 
The Physical Chemistry of the Crystallization and Magmatic Differ- 
entiation of Igneous Rocks. IV. By J. H. L. Vocr. 
Pleistocene Mollusca from Northwestern and Central Illinois. By 
FRANK COLLINS BAKER. 
The Character of the Stratification of the Sediments in the Recent 
Delta of Fraser River, British Columbia, Canada. By W. A. 
JOHNSTON. 
Outline of Pleistocene History of the Mississippi Valley. By 
FRANK LEVERETT. 
Pennsylvanian Stratigraphy of North Central Texas. By RAYMOND 
C. Moore and FREDERICK B. PLUMMER. 
| Suggestions as to the Description and Naming of Sedimentary Rocks. 
By A. J. TIEJE. | 
The Marine Tertiary of the West Coast of the United States: Its 
Sequence, Paleogeography, and the Problems of Correlation. 
By Bruce L. Crark. 
The Relation of the Physical Properties of Natural Glasses to T heir 
Chemical Composition. By W1ILttam O. GEORGE. , 
Notes on a Recent Collection of Fossil Plants from the Dalles Group 
of Oregon. By Ratpu W. CHANEY. 
An Outline of the Geology of New Zealand. By W.N. BENSON. 
