CONTRIBUTORS TO THIS ISSUE 4S1 



effect of foreign voltages on telephone circuits, out of whii li arose the 

 joint study of electric shock. 



R. \'. L. Hartley, A.B., Utah, 1909; B.A., Oxford, 1912; B.Sc, 

 1913; Instructor in Physics, Nevada, 1909-10. Engineering Depart- 

 ment, Bell Telephone Laboratories, 1913-. Mr. Hartley has been 

 associated with researches in the field of carrier current, telephone 

 repeater, and telegraph systems. 



L. \V. HussEY, A.B., Dartmouth, 1923; M.A., Harvard, 1924; B.S. 

 in E.E., Union College, 1930; Mathematics Department, Union 

 College, 1924-29. Bell Telephone Laboratories, 1930-. Mr. Hussey 

 has been engaged principally in work on the stability of regenerative 

 systems and on modulation in non-linear resistances. 



Robert N. Marshall, B.S. in Physics, Princeton University, 1930. 

 Bell Telephone Laboratories, 1930-. Mr. Marshall has been engaged 

 in acoustical studies pertaining to microphone design. 



Edward C. Molina, Engineering Department of the American 

 Telephone and Telegraph Company, 1901-19, as engineering assistant; 

 transferred to the Circuits Design Department to work on machine 

 switching systems, 1905; Department of Development and Research, 

 1919-34. Bell Telephone Laboratories, 1934- As Switching Theory 

 Engineer, Mr. Molina has made contributions to the theory of prob- 

 ability and its applications to telephone problems, such as the efficiency 

 of various trunking arrangements and the significance of data derived 

 from samples. 



D. A. Quarles, A.B., Yale University, 1916; U. S. Army, 1917-19. 

 Engineering Department, Western Electric Company, 1919-25; Bell 

 Telephone Laboratories, 1925-. Mr. Quarles was earlier engaged in 

 transmission studies of circuits and networks. More recently he was 

 in charge of inspection engineering on apparatus products. As Out- 

 side Plant Development Director, he is now engaged in development 

 work on outside plant products. 



Frank F. Romanow, M.E., 1930, M.M.E., 1933, Polytechnic Insti- 

 tute of Brooklyn. Bell Telephone Laboratories, 1930-. Mr. Ro- 

 manow has been engaged in the development of small condenser 

 microphones and in research relating to acoustical instruments. 



