In this time of Instagram’s palm-sized square images, it is hard to imagine walking through the cavern of Grand Central Station and looking up to see a 60-foot-wide panoramic transparency of India’s Taj Mahal, astronauts in space, a field of Oregon wheat, Machu Picchu in Peru, a seaplane on Lake Placid, or skiers landing by plane near the Matterhorn in Switzerland. Yet millions did, courtesy of an advertising campaign by Kodak.