PROCEEDINGS OF THE OHIO ACADEMY OF SCIENCE 111 



3. Marengo Cave. 10 min. (Opaque Projection.) 



W. N. Speckman 



4. A Statistical Study of the Physical Measurements of a 



Class of Students. 10 min. Carl J. West 



5. The Effect of the Eruption of Katmi on Vegetation. 



15 min. (Opaque Projection.) Robert F. Griggs 



6. The Structure of a " Fossil Starfish from the Upper 



Richmond. 10 min. (Lantern Slides.) 



Stephen R. Williams 



7. With the International Phytogeographic Excursion in 



America. 12 min. A. Dachnowski 



8. Comparison of the Mollusk Faunas of the Palsearctic 



and Nearctic Provinces. 15 min. V. Sterki 



9. Flood and Drainage Conditions in Vicinity of Bellevue, 



Ohio. 20 min. George D. Hubbard 



10. The Species Concept as Applied to the Genus Pyro- 



soma. 10 min. Maynard M. Metcalf 



11. Geographic Influences in the History of Milan, Ohio. 



10 min. C. G. Shatzer 



12. The Acclimatization of Trees and Shrubs. 10 min. 



William R. Lazenby 



13. The Life History of Euglena. 12 min. 



Charles G. Rogers 



14. Botanical Observations in Alaska. 20 min. (Opaque 



Projection.) Robert F. Griggs 



15. Conjugation in Amoeba. 8 min. Ralph E. Hedges 



16. Variation in Scirpus atrovirens and S. georgianus. 



10 min. F. O. Grover 



17. The Transparency of Various Substances for Infra- 



Red Radiation obtained by Focal Isolation. 8 min. 



Alfred D. Cole 



18. Note on the Electrical Conductivity of Glass. 5 min. 



Robert F. Earhart 



19. The Villari Reversal Effect in Ferro-Magnetic Sub- 



stances. 15 min. (Lantern Slides.) 



S. R. Williams 



