CONTRIBUTORS TO THIS ISSUE 861 



J. C. Steinberg, B.Sc, M.Sc, Coe College, 1916, 1917; U. S. Air 

 Service, 1917-19; Ph.D., Iowa, 1922; Engineering Dept., Western 

 Electric Company, 1922-25; Bell Telephone Laboratories, 1925-. 

 Dr. Steinberg's work since coming with the Bell System has related 

 largely to speech and hearing. 



R. I. Wilkinson, B.Sc, Iowa State College, 1924; Western Electric 

 Company, 1920-21; American Telephone and Teleg'raph Company, 

 Department of Development and Research, 1924-. Mr. Wilkinson 

 has studied principally the application to telephone problems of the 

 mathematical theory of probability, including sampling and statistical 

 analysis. 



W. Howard Wise, B.S., Montana State College, 1921; M.A., 

 University of Oregon, 1923; Ph.D., California Institute of Technology, 

 1926; American Telephone and Telegraph Company, Department of 

 Development and Research, 1926-. Since coming to the American 

 Telephone and Telegraph Compan\-, Dr. Wise has been engaged in 

 various theoretical investigations. 



