Radio programs.
One example would be <em>Lux Radio Theater, </em>sponsored by Lux, a brand of soap. The <em>Jack Benny Show </em>featured ads from its sponsor, Jell-O. Advertising agencies worked to target sponsorship and ads at the target audience of the programs.
Television, by the way, was just beginning in the late 1920s and didn't really become a dominant media until after World War II.
Simply telling the patient that urine from them will be needed for them to get a proper diagnosis is all that needs to be said
Muhammad was considered a prophet and, thereby, seen as a wise leader.
In addition, they felt that he could settle any issues that would arise
between the people inside of the cities. In addition, this allowed for
more jobs to be created from the newly settled towns, which gave
security to the townsfolk.