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Jeremiah P. Thomas was an American bartender who owned and operated saloons in New York City. Because of his pioneering work in popularizing cocktails across the United States as well, he is considered "the father of American mixology". In addition to writing the seminal work on cocktails, Bar-Tender's Guide, Thomas displayed creativity and showmanship while preparing drinks and established the image of the bartender as a creative professional. As such, he was often nicknamed "Professor" Jerry Thomas. Wikipedia