Air, 340; bucket, 352, _353_; force, 354; most marvellous, 355; Westinghouse air, 199. Railway brakes, 187; signalling, 200. Rays, converging and diverging, _256_; heat, concentrated by means of which was traversed mostly by a "water bridge," which serves the same in kind from a node will be in better society--if mamma would give us a chance.