X MINUTES. [April 24, 



Edwin Brant Frost, Williams Bay, Wis. 

 Robert Aimer Harper, Ph.D., Madison, Wis. 

 William Herbert Hobbs, Ph.D., Ann Arbor, Mich. 

 A. V. Williams Jackson, Ph.D., LL.D., Yonkers, N. Y. 

 John Frederick Lewis, Philadelphia. 

 Abbott Lawrence Lowell, Boston, Mass. 

 William Romaine Newbold, Ph.D., Philadelphia. 

 Charles Bingham Penrose, M.D., Ph.D., Philadelphia. 

 William Howard Taft, Washington. 

 Charles Richard Van Hise, M.S., LL.D., Madison, Wis. 

 Victor Clarence Vaughan, M.D., Sc.D., LL.D., Ann Arbor, Mich. 

 Foreign Residents. 



Francis Darwin, M.A., F.R.S., Cambridge, Eng. 

 Hermann Diels, Ph.D., Berlin. 

 Emil Fischer, Ph.D., M.D., Berlin. 

 Friedrich Kohlrausch, Ph.D., Marburg. 

 Wilhelm Pfeffer, Ph.D., Leipzig. 



Morning Session. 

 Albert A. Michelson, LL.D., Vice-President, in the Chair. 



Prof. Robert William Wood (elected 1908) and Dr. Louis A. 

 Bauer, a newly elected member, were admitted into the Society. 



The following papers were read : 



" On the Remarkable Changes in the Tail of Comet C. 1908 

 (Morehouse), and On a Theory to Account for these Changes," by 

 Prof. E. E. Barnard, of Yerkes Observatory, Williams Bay, Wis. 

 Discussed by Prof. M. B. Snyder, Prof. Michelson, Dr. George F. 

 Becker and Prof. Ernest W, Brown. 



"The Past History of the Earth as Inferred from the Mode of 

 Formation of the Solar System," by Dr. T. J. J. See, of U. S. Naval 

 Observatory, Mare Island, Cal. 



" The Linear Resistance between Parallel Conducting Cylinders," 

 by Prof. A. E. Kennelly, of Cambridge. 



" Vacuum Effects in Electrical Discharge around a Right Angle 

 in a Wire," by Prof. Francis E. Nipher, of St. Louis. 



" The Ruling of Diffraction Gratings," by Prof. Albert A. Mich- 



