112 PROCEEDINGS OF THE OHIO ACADEMY OF SCIENCE 



20. On the Longitudinal Thermo-Magnetic Potential Dif- 



ference. 15 min. A. W. Smith 



21. The Spectrum of Silicon in the Carbon Arc. 10 min. 



(Lantern Slides.) C. D. Coons 



22. On the Vibrations of a Lecher System using a Lecher 



Oscillator. 15 min. F. C. Blake and Charles Sheard 



23. The Wiedemann Effect in Monel and Nichrome Wires. 



10 min. H, H. Reighley 



24. Notes on the Metamorphosis of Two Ascidians. 10 



min. (Lantern Slides.) R. A. Budington 



25. The Elfect of Variation of Intensity and Duration of 



Stimuli to Reaction Time. 10 min. G. R. Wells 



26. Pressure Sensation and the Hair Follicle. 15 min. 



R. H. Stetson 



27. Further Notes on Embryonic Skull of Eumeces. 10 



min. (Opaque Projection.) Edward L. Rice 



28. An Addition to the Odonata of Ohio. 3 min. 



Rees Philpott 



29. The Box-Elder Bug, Leptocoris trivittatus, in Ohio. 



5 min. W. J. Kostir 



30. An Occurrence of Atypus milberti Walck, in Ohio. 



3 min. Carl J. Drake 



31. Remarks on the Distribution of Certain Species of 



Jassidae. 10 min. Herbert Osborn 



32. Observations on the Action of the Heart in Mollusca. 



10 min. V. Sterki 



33. Chromosomes in Opalina. 12 min. 



Maynard M. Metcalf 



34. The Cerebral Ganglia of an Embryo Salamander, 



Plethodon glutinosus. 7 min. W. J. Kostir 



85. Report on the Work done with the Mollusk Fauna of 

 Ohio. 8 min. V. Sterki 



36. Some Additional Records for Ohio Mammals. 5 min. 



James S. Hine 



37. Notes on the Cheese Skipper, Piophila Casei. 5 min 



Don C. Mote 



