Thousands of fans gather at five-day Harmonica Convention
DENVER -- The sound is unmistakable and instantly recognizable. The harmonica. Invented in Germany but is now a part of the American fabric. "Importers on the East Coast had them by about the 1840s, but they really took hold when the mail order catalogs started coming out,” said Winslow Yerxa, president of the Society for the Preservation and Advancement of the Harmonica.