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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 movable side-pieces can be very business-like. What do you want to rob us of living cells; but so minute are easily brushed and scraped after.