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Method No. 2 is a modern version of fresco painting, which may be done on plaster or gesso, preferably on concrete. The medium used is a fast-drying chemical, silicon ester, which may be applied to the wall when it is either wet or dry. On exposure to air, it forms a surface of pure silica resistant to almost any atmospheric conditions. Most impressive concrete mural: a long panel by Angelo Sottosanti and Arthur Schneider. An abstraction of city life, it was typical of the sort Manhattan critics thought least fitting in subways. First results of a public poll conducted by the Museum showed that citypent Manhattanites disagreed with the critics, wanted New York City scenes more than landscapes, fantasy, or humor.