30 



15. An Improved Wehnelt Interrupter, 15 m., 



A. L. Foley and R. E. Nyswander. 



16. A Method of Measuring the Absolute Dilatation of Mercury, 



10 m A. L. Foley. 



17. The Geodesic Line of the Space ds^=dx^+sin^xdy-+dz'-, 



10 m S. C. Davisson. 



18. The Friction of Railway Brake Shoes under Various 



Conditions of Speed, Pressure and Temperature, 



10 m Richard A. Smart. 



19. Diamond Fluorescence, 10 m A. L. Foley. 



20. A Theorem in the Theory of Numbers, 10 Jacob Westlund. 



21. On the Decomposition of Prime Numbers in a Bi-Quad- 



ratic Number-Field, 10 m Jacob Westlund. 



22. Dissociation Potentials of Neutral Solutions of Lead 



Nitrate with Lead Peroxide Electrodes, 10 m.. .Arthur Kendriclv. 



23. Some Observations with Rayleigh's Alternate Current 



Phasemeter, 10 m E. S. Johonnott, Jr. 



CHEMISTRY. 



24. A Demonstration Apparatus, 10 m P. N. Evans. 



25. Methylation of Halogenamides with Diazomethane, 



10 m James H. Ransom. 



26. Note on the Apparent Deterioration of Formalin, 2 m. Thomas Large. 



BOTANY. 



27. Notes on the Examination of Vegetable Powders, 



10 m John S. Wright. 



28. The Staining of Vegetable Powders, 5 m John S. Wright. 



29. Cryptogamic Collections Made During the Year, 8 m. .M. B. Thomas. 



30. Experiments with Smut, 8 m M. B. Thomas. 



31. The Flora of Lake Maxinkuckee, 15 m J. T. Scovell. 



32. Generic Nomenclature of the Cedar- Apples, 10 m J. C. Arthur. 



*33. The Uredineae of Parke County, Indiana, 10 m Lillian Snyder. 



34. Additions to the Flora of Indiana, 10 m Stanley Coulter. 



*35. Seed Vitality in Native Plants, 10 m Stanley Coulter. 



'^' Author absent, paper not presented. 



