434 The Ohio Naturalist. [Vol. XV, No. 3, 



The complete scientific program follows : 



PRESIDENTIAL ADDRESS. 



Some Pioneers of Science in Ohio Dr. T. C. Mendenhall 



LECTURE. 



The Foot and Mouth Disease Dean D. S. White 



College of Veterinary Medicine, Ohio State University. 



PAPERS. 



Efficacy of Lightning Rods J. Warren Smith 



Thunderbolt from WhiteclJff Bay Katherine Doris Sharp 



A Preliminary Survc}^ of Plant Distribution in Ohio 



John H. Schaffner 



Akron Fishbait Industry Chas. P. Fox 



The Physiographic Provinces which meet in Ohio 



N. M. Fenncman 



Color and Coat Inheritance in Guinea Pigs W. M. Barrows 



Note on a New Nematode Parasite of Cryptobranchus 



F. H. Krecker 

 Prediction of Minimum Temperatures for Frost Protection 



J. Warren Smith 

 Is a Dry Summer and Autumn Apt to be Followed by a Wet 



Winter With Possible Floods? J. Warren vSmith 



Comparative Rate of Growth of Certain Timber Trees 



William R. Lazenby 

 Inheritance of Taillessness in the Cat 



W. M. Barrows and C. A. Reese 



The Cause of Milk Sickness and Trembles E. L. Moseley 



Notes on Euglenoidina L. B. Walton 



Recent Eruptions of Mount Lassen Thos. M. Hills 



Glaciation in the High Sierras Thos. M. Hills 



Inheritance of Weights in Tomatoes Fred Perry 



The Municipal Care of Shade Trees J. S. Houser 



Influence of Glaciation on Agriculture in Ohio. .Edgar W. Owen 

 The Reflection of X-rays and Gaiuma Rays from Crystals. (In- 

 troducing discussion.) S. M. J. Allen 



A Class Demonstration of the Peltier Effect J. A. Culler 



Behavior of the Arc in a Longitudinal Magnetic Field 



R. F. Earhart 

 Effect of Heat Treatment on the Physical Structure, Pcrmeabilit\', 



and Hysteresis of Steel R. J. Webber 



The Electron Theory of Metallic Conduction. (Introducing 



discussion.) A. W. vSmith 



The Effect of Changes in Water Resistance and Dielectrics on the 



Vibrations of a Lecher System Geo. W. Gorrell 



Exhibit of Apparatus for Electric Waves: (1) Drude Apparatus 

 for Refractive Index of Electric Waves. (2) A Wavcmeter 

 for Wireless Frequencies A. D. Cole 



