Stratigraphy of the Southern Half of the La Salle Anticline: L. A. 



Mylius, State Geological Survey, Urbana 221 



The Relation of the Secondary School Teacher to the Research 



Worker : Miss Marion Sykes, Bo wen High School, Chicago 229 



The Geographic Value of the Gallatin County Saline: Miss Deette 



Rolfe, University of Illinois, Urbana 232 



Papers on Medicine and Public Health: 



Relationship of Dentistry and Medicine to the People's Welfare of the 



State, and Why: V. A. Latham, M. D., D. D. S., Chicago 239 



On the Teaching of Ear, Nose and Throat Disease: G. W. Boot, 



Chicago 245 



The Teacher in Relation to Communicable Diseases of School 



Children: E. D. Walker, M. D., Litchfield 250 



Three Helpful Aids in the Diagnosis of Gall Bladder Disease: Frank 

 Wright, Ph. C, M. D., Northwestern University Medical School, 

 Chicago 254 



The Filterable Viruses: Thomas G. Hull, Ph. D., Chief, Division 



of Laboratories, State Department of Public Health, Springfield 258 



Axillary Gland Infections and Th«ir Treatment: John 0. Cletcher, 

 M. D., Cisco 261 



Education in the Therapeutics of Gray Matter: Clarence W. East, 

 M. D., Chief. Division of Child Hygiene, State Department of 

 Public Heahh, Springfield 264 



A Study of Acidity Curves in Stomach Contents: Francis M. Thur- 



man, Illinois College, Jacksonville 267 



Practical Infant Conservation: M. D. Pollock, M. D., Decatur 276 



Papers on Physics: 



Some Practical Projects in Teaching Physics: C. Frank Phipps, 



Northern Illinois State Teachers' College, DeKalb 285 



Determination of the Vapor Pressure of Mercury by Means of the 



Knudsen Pressure Gauge: C. F. Hill, University of Illinois 291 



Thermal Conductivity of Concrete: A. P. Carman and R. A. Nelson, 



University of Illinois 295 



Acoustical Design in Buildings: F. R. Watson, University of Illinois 297 

 Note on the Characteristics of the New Singing Tube: Charles T. 



Knipp, University of Illinois 302 



A Wehnelt Cathode for the Emission of a Small, Compact and Perm- 

 anent Beam of Electrons: C. J. Lapp, University of Illinois 305 



Preliminary Note on the Electromagnetic Inductive Properties of a 



Cathode Ray Solenoid: Charles T. Knipp and C. S. Palmer. 



University of Illinois 306 



Efficiency Tests of the New Cenco-Hyvac Oil Vacuum Pumps: 



Charles T. Knipp and C. S. Palmer 309 



Constitution and By-Laws 315 



List of Members 319 



