Chicago Tribune, October 14, 1919, page 14:
WIRELESS PHONE CARRIES OPERA AIRS TO SHOW
The high cost of opera has been solved.
A phonograph located in the Transportation building yesterday transmitted operatic airs via wireless telephone to the Coliseum electric show and the notes were heard as clearly as though the phonograph were at the show's signal corps booth. The feat will be performed twice daily hereafter while the show is open.
The wireless phone operators at Ludington, Mich., and Milwaukee "listened in" on the music played last evening and stated by wireless telegraph that they heard it as clearly as though the music was in their own offices.
Hundreds of women are being attracted by the household inventions at the show. More than 100 electrical manufacturers are exhibiting appliances.
Starting this afternoon, lectures on scientific household methods will be given by Miss Helen Haight, who recently completed a tour of the world.