TABLE OF CONTEXTS 



Page 



Officers and Committees for 1919-1920 5 



Past Officers of the Academy T 



Minutes of the Twelfth Annual Meeting 9 



Reports of Officers and Committees 13 



Report of the Secretary 13 



A Plan of Affiliation between the Illinois State Academy of Science 



and the State Museum 1-1 



Report of the Treasmer IS 



Addresses 1^ 



The Botanical Opporttmity. John M. Coulter 21 



Symposium on Science and Reconstruction 25 



The Effects of the War on Science and the Opportunities 

 and Responsibilities of Science under the New Order of 



Things. Zoology. Heni-y B. Ward 27 



The Problem of Food Production since the Armistice. 



Eugene Davenport 33 



Medicine and Public Health since the War. C. St. Clair 



Drake 37 



The Outlook for Geology and Geography. F. W. DeWolf . . . 47 



Papers of General Interest 55 



The Museiun of Natural History of the University of Illi- 

 nois. Frank Collins Baker 57 



A Proposed New State Park. H. S. Pepoou 64 



Current Tendencies in Science Education in the Secondary 



Schools, J. L. Pricer 69 



The Use of Central District Coals in Water-Gas Manufac- 

 ture, W. A. Dimkley 78 



The Illinois Pyrite Inventory. National Sulphur Situation 



in the Spring of lOlS, G. H. Cady 89 



Papers on Botany 97 



Soil as a Limiting Factor of Forests in La Salle County. 



Illinois, Geo. D. Fuller 99 



The Occurrence of a ■\Miite Form of Tradescantia Virginica 



in Southern Illinois. Clarenc-e BonneU 103 



Some Fungi that are Rare or have not Previously Been Re- 

 ported from Illinois, W. B. McDougaU 104 



The Jack Oak. William Trelease 108 



Studies in the North American Opuntia. C. Z. Nelson 119 



Papers on Zoology i2~ 



A Mussel Survey of the Upper Waters of the Vermilion 

 River with Special Reference to the Salt Fork. Frank 



CoUins Baker and Frank Smith 129 



Notes on Life mstories of lUinois Fish. T. L. Hankinsou . . 132 

 Preliminary Survey of the Acanthocephala from Fishes of 



