Crystal Palace International Electric Exhibition 1881-82

84 324 .—J. Orme & Co., 65, Barbican, E.C. A Collection o£ Apparatus used in teaching the science of electricity; Burglar Alarms, Fire Alarms, &c., for use in manufactories and for domestic purposes. {See Advt. p. 119.) Western Gallery. 325 .—E. Paterson, 76, Little Bi'itain. Instantaneous Electric Gas Lighting Apparatus, as used for nearly 1,000 gas jets at the Grand Hotel, Trafalgar Square. {See Advt. p. 119.) South Nave and Southern Gallery. 326 .—J. Hurly Pring, M.D., Enfield, Taunton. Specimens of Ornamental Engraving on Hardened Steel by means of Voltaic Electricity. A steel plate, sword blade, razor, or other object to be engraved is attached by means of a wire to one extremity of an electro-magnetic arrangement, whilst anothei’ wire coming from the other extremity serves the purpose of the graving tool. During the process, the electric scintillations produced by the combustion of the steel are very beautiful. Some of the specimens here shown were in the exhibition of 1851, whei’e, however, they came into competition, and attracted attention only as objects of “ the fine arts?'’ As showing the advance now made in this application of the electric agency, a specimen, is also introduced of printing by electricity, believed to be the earliest attempt of the kind. It is the work of Sir Joseph Banks, in the year 1802. A drawing, showing the apparatus here employed accompanies the specimens. Eastern Gallery, 327 .—F. Murray Rogers, 21, Finsbury Pavement, E.C. Rotating Table for mounting Microscopic Objects; Office Indicator for placing at street door ; Stocks and Dies for small work. Southern Gallery. 328 .—Julius Sax, 108, Great Russell Street, Bloomsbury. Electric Tell-tale Clock for watchmen; Electric Water Gauge Apparatus for recording high and low water, by means of which the engineer at pumping station can. tell the exact height of water in reservoir. Eastern Gallery and South Nave. 329 .—Scientific Toy Company, Sun Works, Kirkwood Road, Peckham. Boxes of electrical Novelties and Scientific Toys (prices from Is. to 2s. 6d.) suitable for the instruction and amuse- ment of youth: comprising, Electricity, Magnetism, Electro- plating, a Shocking Machine, Model Electric Lamp, Electric Telegraph, Electric Bells, and Moving Figures. {See Advt., p. 139.) Gallery at back of Concert Room. 330 .—Arthur Shippey & Co., 13 and 14, King Street, Cheap- side. Electric Light Signal Balloons for saving life at sea, and for signalling communications between light-ships, light-houses, and the shore. Concert-Room Gallery. 331 .—C. E. Spagnoletti, Great Western Railway, Paddington Station, London. Electric Fire Alarm. South Nave. 332 .—F. Van Stan, 9, Havelock Terrace, High Street, Peck- ham. An impi’oved Cement for electricians, opticians, experi- mental chemists, &c., possessing the following advantages: Perfect insulation, extraordinary tenacity—resisting boiling water and dry heat—joining equally well the finest blown-glass flasks or tubes or heavy cylindrical machines, also ebonite and wood to