The Talking Machine World, November 15, 1919, page 137:

EXHIBITS  AT  ELECTRIC  SHOW
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Five  Talking  Machine  Concerns  Make  Displays  At  Chicago  Show--Large  Attendance
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    CHICAGO, November 5.--The annual Chicago Electrical Show, recently closed, was a success in every way and particularly so far as it effects the exhibitors of talking machines. There were only five of those present, but from the sizes of the crowds and the optimistic stories of the booth managers, there ought to have been at least double this number in evidence.
    The most interesting feature of the show was a wireless demonstration of a Pathé record, staged under the auspices of the Commonwealth Edison Co., manufacturers of the "Federal Electric" talking machine, the Western Electric Co. and the U. S. Army Signal Corps. Wireless apparatus located at the Transportation Building, over a mile distant from the Show, recorded the playing of Pathé records and transmitted the music by wireless to receiving apparatus located at the Show. Although in the evening the reproduction was somewhat marred by that bugaboo of the wireless operator, "static," the playing was faithfully reproduced and in sufficient volume to be heard in all parts of the particular building in which the receiving apparatus was located. A list of the latest Pathé records was posted on the wall and all that was necessary was a request for any one of the selections to hear it played via wireless. Of course, any amateur or professional wireless stations could "pick up" the music, and did so, as the many letters and telegrams from out-of-town stations attested. Sergeant W. A. Miller, U. S. Signal Corps, in charge of the station, received letters from amateurs in Milwaukee and even farther away, telling of their delight in the music. Quite an original method of popularizing a talking machine record, this. Every wireless telephone operator in the surrounding country is thoroughly familiar with the Pathé best sellers.