Five years before the 1876 Centennial Exposition celebrated the nation’s confidence in its technological prowess with towering displays of manufactured goods, a group of Philadelphia photographers, lithographers, and printers produced an elegant, leather-bound album paying tribute to local industry. They called it Gallery of Arts and Manufacturers of Philadelphia , and they pasted in fifty-eight black-and-white photographs, each mounted in a lithographed frame on its own gilt-edged page. Merchants no doubt paid handsomely to be included in the album, and they probably displayed it in their stores and in hotel lobbies, a proud exemplar of the business directory—a form that began in the eighteenth century with simple printed lists of tradesmen. By the 1820s these lists had evolved into pocket-sized, sparsely illustrated books, replaced, twenty years later, by individual lithographed sheets enlivened with pictures of fashionable shoppers and horse-drawn carriages. By 1856 this form of advertising was well enough established for J. H.