Program of Thirty-eighth Annual Meeting 13 



Evaporation of Solutions in Burettes. M. G. Mellon, Purdue University. 

 The Use of Solutions of Inorganic Salts as Permanent Color Standards, 



M. G. Mellon, Purdue University. 

 An Improved Murexide Test for Teaching Purposes. Samuel E. Earp, 



Indianapolis. 

 Fog Formation in Air Which Has Passed Through a Silent Discharge. 



(Illustrated). F. O. Anderegg and K. B. McEachron, Purdue 



University. 

 A Type of Silent Discharge Involving Catalysis. (Illustrated.) F. 0. 



Anderegg and E. H. Bowers, Purdue University. 

 A Further Study of Pressure Reversals in the Corona Discharge. 



(Illustrated.) F. 0. Anderegg, Purdue University. 

 *The Peculiar Properties of Water in light of its Molecular Structure. 



(Illustrated.) F. 0. Anderegg, Purdue University. 



Physics. 



*Some Untenable Acoustic Theories. Arthur L. Foley, Indiana Uni- 



vei*sity. (Published under title "A Photographic Study of Sound 



Pulses between Curved Walls and Sound Amplification by Horns," 



in Physical Review, S.S., vol. 20, no. 6, December, 1922.) 



Improved Designs of Sound Condensers. (Illustrated.) Arthur L. 



Foley, Indiana University. 

 Locomotive Whistle Experiments. (Illustrated). Arthur L. Foley, 



Indiana University. 

 *Energy Losses in Commercial Hammers. (Illustrated.) Edwin Mor- 

 rison, Michigan Agricultural College. 

 *Scattering of Light by Small Particles. (Illustrated.) Edwin Mor- 

 rison, Michigan Agricultural College. 

 *Spectrum of Phosphorescent Mercury. (Illustrated.) E. K. Chapman, 



Wabash College. 

 A Method of Measuring the Amplification of Two or More Stage Ampli- 

 fiers. (Illustrated.) R. R. Ramsey, Indiana University. 

 A Method of Securing Accurate High Frequency Standard. R. R. 



Ramsey, Indiana University. 

 An Oscillographic Study of an Induction Coil with High Frequency 

 Load. F. 0. Anderegg and K. B. McEachron, Purdue University. 

 An Investigation of the Foley Telephone Mouthpiece. (Illustrated.) 

 James E. Brock, Sweetser. 

 ^Diffraction of Light through Circular Openings. (Illustrated.) Mason 

 E. Hufford, Indiana University. 



BIOLOGICAL SCIENCES. 



Zoology. 



*Some Genes Modifying Crossing-Over. F. Payne, Indiana University. 

 The Occurrence of Secondary Parasitism in the Frog. (By title.) George 

 Zebrowski, Purdue University. 

 * Papers starred (*) not published in this proceedings. 



