Discussion on "Phantom telephone circuits, and combined telegraph and telephone circuits, worked at audio frequencies"

Andrew Ogilvie;A.B. Hart;A.E. Thompson;S. Inada;W. Aitken;W.J. Thorrowgood;C. Robinson;G.C. Marris;F. Reid;P.E. Erikson;W.J. Medlyn;F. Mercer;A.B. Morice;A. Morris;E.S. Ritter;E.V. Smart;H.T. Werren;J.G. Hill

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