New Orleans architect John F. Braun placed this ad in Soards' City Directory in 1886. He served as the Superintendent of Buildings and as an agent for Chicago's W.E. Hale & Co. and New York's Otis Brothers & Co. Both companies produced new elevator designs, and by 1887 Otis was also selling rotating fans that operated on one-horse gas engines.
Image above: John F. Braun advertisement, Soards' City Directory. New Orleans, 1886. Southeastern Architectural Archive, Special Collections Division, Tulane University Libraries.