"'Framing a Century: Master Photographers, 1840-1940,' at the Metropolitan Museum of Art, manages to operate in the gap between both kinds of miracles, innovative and talismanic. It presents the history of a medium as well as history itself. This exhibition appropriates a model usually reserved for painters, old or modern masters. Organized by Malcolm Daniels, the curator in charge of the Met's photography department, "Framing a Century" recounts the medium's 100 years with a succinct cavalcade of big names, substantial bodies of work and significant historical impact."