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. land IV. By J.H.L. Vocr. 
Cycles of Erosion in the Piedmont Province of Pennsylvania. By 
F. BAScoM. 
Theoretical Considerations on the Genesis of Ore- Deposits. By 
Reve RASTATN, ; 
Note on a Possible Factor in aeons of Geological Climate. By 
HARLOW SHAPLEY. 
The Horizontal Movement of Geanticlines and the Fractures near 
Their Surface. By H. A. BROUWER. 
Field Observations in Northern Norway Bearing on Magmatic 
Differentiation. By STEINER FOSLIE. 
Geologic Reconnaissance in Baja California. By N.H. Darron. 
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. 
Pennsyloanian Stratigraphy of North Central Texas. By RAYMOND 
C. Moore and FREDERICK B. PLUMMER. 
Suggestions as to the Description and Naming of Sedimentary Rocks. 
iby 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. CLARK. 
The Relation of the Physical Properties of Natural Glasses to Their 
Chemical Composition. By Wititam O. GEORGE. 
Notes on a Recent Collection of Fossil Plants from the Dalles Group 
of Oregon. By RALPH W. CHANEY. 
