X MINUTES. 



Albert Sauveur, S.B., Cambridge, ]\Iass. 

 William Albert Setchell, A.M., Ph.D., Berkeley, Cal. 

 Julius O. Stieglitz, Ph.D., D.Sc, Chicago. 

 Ambrose Swasey, Sc.D., D.E., Cleveland. 



Morning Session, lO o'clock. 



William B. Scott, D.Sc, LL.D., President, in the Chair. 



Prof. James Henry Breasted, a newly elected member, subscribed 

 the Laws and was admitted into the Society. 

 The following papers were read : 



" Artificial Formations Resembling Lunar Craters," by Captain 

 Herbert E. Ives, B.S., Ph.D., of Philadelphia. Discussed by 

 Prof. Magie, Mr. Davis and Prof. Webster. 



" The Meteorological Service of the Signal Corps in the War," 

 by Robert A. Millikan, Ph.D., Sc.D., Professor of Physics, 

 University of Chicago. 



" Detection of Submarines," by Harvey Cornelius Hayes, Ph.D., 

 Naval Experimental Station, New London. (Introduced by 

 Prof. John A. Miller.) Discussed by Prof. Webster. 



" Errors Induced in Bullets by Defects in their Manufacture," 

 by Ernest W. Brown, M.A., Sc.D., Professor of Mathematics, 

 Yale University. Discussed by Messrs. Akimoff, Webster, 

 Brush and Brown. 



" Sound and Flash Ranging," by Augustus Trowbridge, A.AI., 

 Ph.D., Professor of Physics, Princeton University. 



"The Work of the Ballistic Institute of Clark University," by 

 A. G. Webster, Ph.D., Sc.D., LL.D., Professor of Physics, 

 Clark University, Worcester, ]\Iass. 



" Alternating-Current Planevector Potentiometer Measure- 

 ments at Telephonic Frequencies," by A. E. Kennelly, A.M., 

 Sc.D., Director Research Division, Electrical Engineering 

 Department, Massachusetts Institute of Technology, Cam- 

 bridge, and Edy Velander. Discussed by Prof. Webster. 



" The Genesis of Petroleum as Shown by its Nitrogen Con- 

 stituents," by Charles F. Mabery, Sc.D.. Emeritus Professor 

 of Chemistry, Case School of Applied Science, Cleveland. 

 (By title.) 



