INDEX.
783
alizier-M'ood writing-case, 654. Specimens of fans,668. Description of some pipes and pipe-bowls, 072.
Egvpt. U. H. the Viceroy of, xxxv, 452, 530.
Egyptian Government, The, 99, 501, 564.
Ehrenzeller, F.. 470.
Eichelburg, 11. D., and Co., 60S.
Eichneb, G., 081.
Eickholt. Anton, 371.
Eiffe, —, 330.
Einsiedel, Count G , 504, 697, 707.
Eipenscblcid. L.. 78.
Eisenbrandt, C. H ,33-3.
Ekaterinburg Imperial Polishing Manufactory (Russia ^,566.
Ekins. J.. 559.
Elastic Cloths— Specimens of, for gloving. 353.
Elastic Tissues— Specimens of, from France , very wellmade, 482. Reference to the process of manufacturingelastic tissues from caoutchouc or India-rubber dis-covered in France , specimens exhibited, 591, 592, 596.
Elaterium— Samples of, 50.
Electric Telegraph Company, 237.
Eldon, Karl of, 635.
Eldon, Earl of, and Lord Stowell, Statues of— Noticeof, 635, 693.
Elephants’ Tusks.— See hory.
Electric Current Regulator. —Principles and purposesof the apparatus, 289, 2,0.
Electric Magnets —Steel best suited for, is that employedto form the balance springs of watches, 293.
Electric Printing Tf.lf.graphs.— Observations thereon,237. Instruments exhibited, 289. Description thereof.289, 2 '0.
Electric Telegraphs and Apparatus. — Great varietyplaced in the Exhibition, novelty of construction, andimportant improvements in some of them. 215. Largenumber of ingenious contrivances applicable to everystage of electric telegraph communication, 283. Dili-gence of the Electric Telegraph Company in possessingthemselves of numerous patents, ib. Fine collectionexhibited by them, 283, 284. Firm standing obtainedby the needle telegraph, giving conventional signals,
284. Recent improvements in the galvanometer, id.Perfection of the needle telegraph, id. Form of theneedle most generally used, ib. History of the electrictelegraph from its discovery, detailing the improve-ments etl'ectcd, ib. Valuable inventions exhibited, ib.Observations on the essential or fundamental pointsof an electric telegraph, firstly, the generation of theforce, 284, 285. Secondly, the insulation of the force,
285, 236. Thirdly, the utilization of the electric force.
236. 287. Gutta percha the most valuable materialfor the insulation of the wires, 235. Great protec-tion required for submarine wires, ib. Specimens of ;McNair’s process of covering gutta-percha wire, ib.Construction of wrought-irou chain pipes, with swiveljoints for protecting submarine wires, ib. Difficultiesin the application of this plan. 236. Plan worthy ofcommendation, which has recently appeared, combin-ing the leading essentials of a submarine wire, ib. De-scription of the principle of construction, ib. Electricsignals by ignition, ib. Illumination shocks, <6. Prin-ciple of Bain's printing telegraph, ib. The galvano-meter most successfully pressed into telegraphic service,forms the essential part of the needle telegraphs, 286,
237. Varieties of needle telegraph, 287. Printing,reading, and motive processes, ib. The French Govern-ment required signals to resemble those of the oldsemaphores ; they have extensive codes, ib. Conven-tional siguals preferred in England, ib. In Prussiaevery letter is pointed out, ib. Printing telegraphspreferred in America , ib. Reading instruments pre-ferred in England, ib. Instruments that have obtaineda standing are those whose action is direct, and notthe result, of any extraneous mechanism, ib. Descrip-tion of the several telegraphs exhibited, 2S7, et seq.Specimens of cables designed for the protection of sub-marine telegraphic wires, 2J0. Electro-chemical tele-graph by Bain, ib. Copying electric telegraph by Bake-well, ib. Mode of insulation of telegraphic wires. 290,291. Observations with regard to wires suspended in theopen air, 2 >1. Substitution of a large open-mouthedcone, for the old form of cone, ib. Lines of rail wherethis system has been carried out, ib. Remarkable fortheir perfect insulation and good working order, ib.Improvements made with regard to the insulation of
tunnel wires. 291. Mode adopted in tunnels, ib. Intro-duction of the compound needle by Mr. Walker, ib.Principle thereof, ib. Construction of bell transferrers,ib. This application is not generally employed, ib.Advantages of the plan, which works well, ib. Varie-ties of turn plates constructed by Mr. Walker, ib. De-scription of the branch double turn plate, ib In dailyuse, and acts well, ib. Lightning conductor for theprotection of the telegraph and wires, ib. Graphitebattery, description thereof, 291, 292. Moveable studsoriginated by Mr. Walker, 2 2. Simplicity of thecontrivance; it works well, ib. Ringing handle forstations where the bell has a distinct Mire to itself, ib.Object thereof, satisfactory performance, ib. Allan’spatent needles described, ib. Great advantages gainedby the combinations, ib. Description of, and observa-tions on Dering's eleitric telegraph, 292, 293. Modelof an electro-magnetic telegraph by Alexander, 293.Interesting as representing an early* development ofthe idea of a needle telegraph, ib. Specimens ofelectric-conducting Mires for subaqueous purposes, ib.All the submarine Mires exhibited based uponMcNair’s Mire, ib. Apparatus in connexion Mith thetelegraph, ib. Gutta-percha pipes for protecting sub-marine wires, ib. Ingenious Prussian electric tele-graph, ib. Details of construction and M’orking pointsin which it differs from other telegraphs, 293, 294.Arrangements provided for facilitating the transmis-sion of electric force to long distances, 2J4. Saxonelectro-magnetic telegraph, ib. Applicable to theordinary use of telegraphs, ib. Alarm bell attached,readily put in and out of connexion, ib. Pair of elec-tric telegraphs adapted for domestic purpose?, ib.Electrical apparatus for ringing belis in large mansions,234, 295.
Electric Telegraph Alarum Bell — Description ofBrett’s patent, 2. 3.
Electric Telegraph (Comic )—Description of, inventedby* — Smith, 293.
Electrical Clocks. —See Turret Clocks .
Electrical Instruments. — Very few in number, 231.None adapted for determining the quantity of atmo-spheric electricity for meteorological purposes, ib.Great Mant of such an instrument, ib. Application ol'steam power to the production of electricity, ib.Gutta percha electrical machines, 231. 232. This holdsout the hope of obtaining electricity of tension on alarge scale by the application of steam pouer, ib.Description of this machine, 2S2. Gutta percha ap-plied to such a purpose quite new, ib. Glass plateelectrical machine, with both positive and negativeconductors, ib. Delicate astatic galvanometer, ib.Description and object of tills apparatus, ib. Harris’sthermo-electrometer, ib. Simple and effective electricalmachine for medical purposes, ib. Hydro-electricchain batteries, ib. Arranged to be very portable,designed to be worn on the body for the cure of chronicdiseases, ib.
Eleutro-dynamomf.ters. —Weber's electro-dynamometerfor measuring the intensity of galvanic cuircnts, 313.General remarks thereon, ib.
Electro-magnetic Machines and Apparatus. —Appli-cation of electro-magnetism to the movement ofmachines, 232. Discovery of Professor Oersted, ib.No great power yet obtained, ib. .Many importantdifficulties overcome, ib. Objects exhibited, 282, 283.Description thereof) and observations of the Jurythereon, ib.
Electro-Plating . —Application of sulphuret of carbon toelectro-plating, 33. Important position in industryand commerce maintained by the electric process ofgold-plating, silver-plating, &c.. 511. Intioduction ofthe process into England by Messrs. Elkington. Mason,and Co., ib. Remarks on the collection exhibited bythis firm, 512. Specimens of electro-plating, afterElkington’s patent, from France . 518.
Electrotypes. — Application of electrotyping to typefounding, 411. This an improvement deserving men-tion, ib. Ingenious device for preventing the castfrom adhering to the original plate, ib. Specimensexhibited, 412, 509. List of awards, 451.
Electuum —Works of Art in, 635.
Elffroth, D. 11., 3t2.
Elhage Aly Elmajboor, 93.
Elhoungne, Daveluy d’, 447.
Elkington, Mason, and Co., 33, 512, 739.
Ellam, Jones, and Co., 45.