12 LIST OF PUBLICATIONS EXAMINED. 
Wyoming Historical and Geological Society: Proceedings and Collections, Vol. VI, 
1901. Wilkesbarre, Pa. 
Wyoming University, School of Mines. The Sweetwater Mining District, 1901. 
Petroleum Series: Bulletin, No. 4, 1901. Laramie, Wyo. 
Experiment Station : Bulletin, No. 49, 1901. Laramie, Wyo. 
Yale University: Bicentennial Publications; Mineralogy and Petrology, edited by 
S. L. Penfield and L. V. Pirsson; Studies in evolution, mainly reprints of 
occasional papers selected from publications of the laboratory of invertebrate 
paleontology, Peabody Museum, Yale University, by Charles Emerson 
Beecher. 
Yorkshire Geological and Polytechnic Society: Proceedings, new series, Vol. XIV,, 
Parts 1-2, 1901. Leeds, England. 
Zeitschrift fur praktische Geologie, 1901. Hefte 1-12 (except abstracts). Berlin, 
Germany. 
