Wilkes-Barre (Pennsylvania) Times Leader, March 13, 1913, page 18:
MUSOLAPHONE IS THE LATEST DEVICE FOR TELEPHONE USE
A Musolaphone demonstration is to be given tomorrow and Saturday at the office of J. B. Russel & Co. on South Franklin street. The musolaphone is a device for transmitting sound over an ordinary telephone wire from one central point to all parts of the city simultaneously with the same purity and volume as though the instrument or vocalist were present. John Barnes Wells, a well known singer, is to be here and sing for the entertainment of those who care to attend the demonstration.
It is the intention to have one of the local telephone companies take up the device and the patrons of the company can have it attached to telephones in their homes and offices and thereby be placed in a position to hear stock markets, musical programs, base ball scores and events of the day without interrupting their telephone service. The scheme is being worked out with great success in many of the big cities.