Dr. Savage's health studio featured a Zander "horse-back machine" in the mechanical room next to two machines from John Harvey Kellogg and what was probably a Sargent rower (see lower-left corner of floor plan). "The Dr. Savage Health Studio," undated brochure, Warshaw Collection of Business Americana, Physical Culture Files. Courtesy of the National Museum of American History, Smithsonian Institution.

From The body electric: how strange machines built the modern American by Carolyn Thomas de la Peña