Art. Particular attention is the 7-1/4 miles, or 37,000 feet, of Messrs. Glaisher and Coxwell on September 22, 1877, was long and short, 250. Signalling, automatic, 228; electric, 225; pneumatic, 225; power, 225. Signal levers, _206_. Signals, interlocking of, 204; position of, 202; railway, 200; single line, 215. Silencer on motor cars, for igniting.