C.Mowry, of Auburn, N. Y., has issued a card in which he states he has invented- an arrangement by which the elasticity o f compressed air can be used to propel carriages on railroads. . The air is compressed by water-power or otherwise, and carried in a tube or pipethe whole length of the road. He also says he has taken measures to secure a patent for the same. He perhaps thinks he hasmade a most wonderful discovery; it is neither new nor useful.