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CONTENTS 



Page 

 List of Illustrations 5 



Officers and Committees for 1915-1916 7 



Past Officers 8 



Eighth Annual Meeting 9 



Report of Secretary 11 



Report of Treasurer , 13 



Resolutions Concerning State Museum and State Academy 13 



Report of Resolutions Committee 14 



Report of Committee on an Ecological Survey of the State 15 



Report on the Relation of Chemistry Courses to Applied Science of 



Modern High School 17 



New Members Elected 1915 20 



Addresses : 



Address of Welcome, Kent E. Keller 22 



Response, John M. Coulter 22 



Toastmaster's Address, The Philosophy of Science, iW. A. 



Northcott 23 



The President's Address : The Relation of Academies of Science 



to the State, A. R. Crook 27 



Abstract of Lecture, Volcanic Emanations, Arthur L. Day 31 



Recent Developments in Surgery, Don W. Deal 32 



Symposium : 



Outline of the Chemistry of Colloids, D. A. Maclnnes 43 



Significance of Colloidal Chemistry in Physiology, William Crocker 47 



Papers on Water Supply : 



Examination of Drinking Water on Railway Trains, Edward 



Bartow j 71 



The Arsenic Content of Filter Alum Used by Illinois Water 



Purification Plants, A. N. Bennett + 75 



The Longevity of Bacillus coli and Bacillus typhosus in Water, 



M. E. Hinds ^ 78 



Manganese in Illinois Water Supplies, H. P. Corson 82 



Comparison of Methods of Determining Dissolved Oxygen in 



Water and in Sewage, F. W. Mohlman 88 



