PAGE 



Geological Sequence in the Vicinity of La Salle as Revealed by 

 Recent Drilling, Gilbert H. Cady 87 



Correlation of the Devonian System of the Rock Island Region, 



W. Elmer Ekblaw 96 



A Tufa Deposit near Danville, Illinois, Charles E. D^ker 109 



On the Earthquake of January 2nd, 1912, in the Upper Missis- 

 sippi Valley, Anton D. Udden Ill 



Notes on Sangamon County Limestones, A. R. Crook 115 



IV. Biological Papers : 



Notes on the Forests of Ogle County, Illinois, W. L. Eikenberry. . 121 

 Competition and General Relationships among the Subterranean 



Organs of Marsh Plants, Earl E. Sherfif 125 



The Range of Evaporation and Soil Moisture in the Oak-Hickory 



Forest Association of Illinois, Wade McNutt and Geo. D. 



Fuller 127 



Germination and Growth of the Cottonwood upon the Sand Dunes 



of Lake Michigan, near Chicago, Geo. D. Fuller 137 



Recent Additions to the Catalog of Illinois Mollusca, F. C. Baker. 143 

 Earthworms from Illinois, Frank Smith 145 



V. Science in the Secondary Schools : 



Relation of Pure and Applied Science in High Schools of Ordinary 



Type, Worallo Whitney 157 



Relation of Pure and Applied Science in the Agricultural High 



School, J. T. Johnson 168 



VI. Necrology : 



Fred Lemar Charles by Elliot R. Downing 175 



List of Members 177 



Index 185 



