Correspondence with American observatories and universities, including Donald H. Menzel of the Harvard College Observatory, Cambridge, Massachusetts; A.R. Sandage of the Mount Wilson and Palomar Observatories, Pasadena, California; Mrs J. Wardlaw of the University of Texas, Austin; R. Zander of the John Hopkins University, Baltimore, Maryland; Professor S.W. McClusky of the Warner and Swasey Observatory, East Cleveland, Ohio; John R. Isbell of the Case Institute of Technology, Cleveland, Ohio; Paul W. Hodge of the University of Washington, Seattle; G.E. Kron of the United States Naval Observatory, Flagstaff, Arizona; N.U. Mayall of the Kitt Peak National Observatory, Tucson, Arizona; and Professor T.L. Page of the Van Vleck Observatory, Middletown, Connecticut.