Crystal Palace International Electric Exhibition 1881-82

81 is driven by this belting the electric light is less liable to flicker, and there is a total absence of vibration. Great economy over all other beltings. Enormous tensile strength. (See Advt. p. 125.) Gallery baclc of Concert Room. 306.—J. Collis & Co., 138,Fleet Street E.C.,& 72, Denmark Hill. Camberwell. Illustrations from Drawings and Engravings on. Wood of Electrical Appliances and Machinery, as supplied to The Electrician journal, and to scientific apparatus manufacturers and engineers for insertion in newspapers, trade catalogues, books, and general advertising purposes. Western Gallery. 807.—H. Whiteside Cook, Stonclon Massey, Brentwood, Essex. An Electric Governor for screw steamers. A sensitive pressure- gauge near the screw indicates the pressure of water on it; when this falls to the point where racing begins, the needle of the gauge makes contact with, a spring, completing a circuit through a magnet in the engine-room. This magnet opens the valve, of a very small steam-cylinder connected with, the throttle- valve and instantly cuts off the steam. When increasing pres- sure breaks the contact at the gauge, steam is as instantly turned full on. Avenue between Pompeian Souse and Chinese Court. 308 .—H. J. Dale, 4, Little Britain. Educational and other apparatus. (See Advt. p. 123.) . Eastern Gallery. 309 .—J. Darlington, 2, Coleman Street Buildings, Moorgate Street, E.C. Bornhardt's Patent Electrical Firing Machine. This machine is designed for the purpose of firing suitable fuses for blasting in mines, quarries, tunnels, &c. The current is generated by turning an ebonite disc, and stored in a Leyden jar, whence it is discharged through, the line wires by pressing a knob. The advantages of electrical blasting are safety of life, economy of time, labour, and capital. By the simultaneous ignition of the charges the whole force is developed at the same instant, and, being’ brought to bear on the entire mass to be tended, a much, greater effect is produced than would be the case if the holes were fired independently, each, hole having to shift its own burden without any assistance from tlie others. The fuses used in connection with this machine are thoroughly reliable, and can be stored any reasonable length, of time without deteriorating, whether in hot, cold, or damp climates, and be depended upon to do their work afterwards. The prices of these fuses will be found much, lower than any other similar article manufactured. Eastern Gallery. 310 .—Davis & Timmins, Bowling Green Lane, Farringdon. Road, E.G. Screws, Terminals, Binders, Connectors, Coil Pins, Battery Clumps, Pole Pieces, and all descriptions of turned work, in Brass, Iron, Steel, Ebonite, and Vulcanised Fibre, for electric lights, telephones, and telegraph works. Sole agents for straight drawn brass and iron wire, specially manufactured for turning purposes. All sizes kept in stock up to 1| inch diameter. (See Advt. p. 141.) Southern Gallery. 311 .—Edison Electric Pen and Writing Agency, 14<0, Pen- church. Street, London (representing proprietor of patent,