Crystal Palace International Electric Exhibition 1881-82

95 Class IV— Gables, Wires, Lightning Conductors,.and allied Apparatus. 386 .—Prof. T. A.Edison, care of E.H. Johnson, Esq.,57, Holborn Viaduct. Specimens of Street Pipes and Service Boxes used in the Edison underground system of conductors ; System of House Conductoi’S with, devices for preventing abnormal increase of energy in house circuits. Entertainment Court. 387 .—E. Perrody, 3, Rue Chaponniére, Geneva, Switzerland, Subterranean Electric Line for Railways, forming only one with, the metallic sleeper of E. Perrody's system. The same line can be placed independently of the railway, and can be applied .anywhere else. Eastern Gallery. Class V—Apparatus for Measuring Electricity. 388 .—Prof. T. A.Edison,care of E.H. Johnson,Esq., 57,Holborn Viaduct. Apparatus for measuring the resistance of the lamps ; Apparatus for measuring the energy consumed in the lamps; Rheostat for restoring currents; Thermogalvanometer; Carbon Rheostat; Dynamometer; Photometer; Carbon Regulator; Weber Meterj Current Regulators; Circuit Breakers for controlling electric light circuits. Entertainment Court. 389 .—Messrs. Gravieb, Kuksz, Luedtke, et Grether, Rue Leszno, Varsovie, Russie. Galvanometers, as applied to their new dynamo machines. West Corridor. Class VI.—Telegraphs, Signals and allied Apparatus. 390 .—Victor Bartelous, 1, Rue du Persil, Brussels. An Automatic Transmitter of Signals in case of fogs, &c. &c. Western Gallery. 391 .—D. Cohn., 34, Rue du Sentier, Paris. Electric Bells, with a lighting application. Eastern Gallery. '392.—G. Cumming, 803, East 19th Street, New York. Periphery Contact Telegraph Key. Exhibited with. Professor Edison's exhibits. Entertainment Court. 393 .—Prof. T. A. Edison, care of E. H. Johnson, Esq., 57, Holborn Viaduct. Carbon Relay; Motograph Relay; Pressure Relay; Expansion Relay; Private Line Instrument; Gold and Stock Reporting Instrument; 2 Systems of Domestic Signalling Telegraph.; Quadruples Telegraph.; 2 Systems of Duplex Telegraph; Telegraph System in Morse characters; Roman character Automatic Telegraph. Entertainment Court. 394 .—Salvatore Gabau, Dr., Samassi, Sardinia. 4 Models of Railway Carriages with a new alarm apparatus. Eastern Gallery. 395 .—M. J. Gras, 41, Rue Bellechasse, Paris. Military- Speaking Signals, with instantaneous changes of communication, effected by either continuous or intermittent currents, variations in resistance, permanent calls, constant controllers of the wire, &c. ' Eastern Gallery.