An original scan for this article is at:
The (Culbertson, Montana) Searchlight, July 22, 1910, page 6:

Automatic  Enunciator  Imperils  Messengers'  Jobs.

Inventors  of  Sound  Magnifier  Claim  it  is  Possible  to  Talk  to  Millions  of  People  Thousands  of  Miles  Away--How  Worked.

    Chicago.--An automatic enunciator, by which a man talking in New York can be heard in every part of a large room in Chicago, that may throw most of the bell boys to the hotels and clubs out of a job, and that may make it possible for a public speaker to address a million or more people at one time, was given its first public demonstration in Chicago the other day.
    A man whose wife is somewhere in the shopping crowd of a big store can be located instantly by the new device, it is promised, and as a word spoken into the transmitter can be heard in every room with which the instrument is connected, it may be need to call trains in railway stations and to spread a fire alarm throughout a large building.
    From the fifth floor of one building to the third of another was the distance in the test, but a distance of 900 miles from Pittsburg to Columbus Ohio, and back to Pittsburg, has been successfully negotiated, according to Joseph Harris, president of the Automatic Electric company, who had charge of the test. Ordinary telephone wires are used by the new instrument, the receiver and transmitter being on new lines. A graphophone horn at the receiving end of the instrument sends the voice of the person at the transmitter to all parts of the room at the other end of the wire.
    With every public room of a big hotel connected with an enunciator, it will no longer be necessary to send a bellboy traveling over the building calling out messages for the guests, the inventors of the instrument declare. The message spoken into the transmitter will be heard over the entire building, and will not need to be repeated. Several big Chicago hotels will have them in operation before fall, Mr. Harris declared, one big hostelry now nearing completion having already concluded arrangements for the automatic bellboy.
    Theodore Roosevelt, had he postponed his visit until the work of installing the instruments had progressed a little further, could speak to practically every person in Chicago without getting hoarse, the enthusiastic inventors pointed out. All that would be necessary would be to put a transmitter on the platform beside him and connect up various halls in all parts of the city, where people of the different neighborhoods could gather.
    Running descriptions of baseball games, or prize fights can be sent over long distances for the entertainment of sporting fans of all varieties. Cabs can be called from the theaters while waiting parties remain inside the building, and trains may be equipped with the instrument so that stations may be called in all the cars simultaneously.
    Beyond stating that the enunciator is the combined work of a number of American and foreign inventors, Mr. Harris refused to reveal the discoverer of the new method of sound transmission.