The Encyclopedia britannica; a dictionary of arts, sciences, and general literatureWith new maps, and original American articles by eminent writersWith American revisions and additions, bringing each volume up to date . continual successionof sparks to pass between the indicator and a metal plate situatedbeneath it and having a plane surface parallel to its line of the surface of the plate and between it and the indicatorthere was passed, at a regularly uniform speed, in a direction per-pendicular to the line of motion of the ;ndicator, a material capableof being acted on phj-sical
The Encyclopedia britannica; a dictionary of arts, sciences, and general literatureWith new maps, and original American articles by eminent writersWith American revisions and additions, bringing each volume up to date . continual successionof sparks to pass between the indicator and a metal plate situatedbeneath it and having a plane surface parallel to its line of the surface of the plate and between it and the indicatorthere was passed, at a regularly uniform speed, in a direction per-pendicular to the line of motion of the ;ndicator, a material capableof being acted on phj-sically by the sparl either through tlieirchemical action, their heat, or their forc«. The recordof the signals given by this instrament was an undulating line offine perforations or spots, and the character and succession of tbiundulations were used to interpret the signahi to be sent. (3) The latest form of receiving instrument for long submarine Siphoncables is the siphon recorder, for which Sir W. Thomson obtained recerdei. * See bi9 Mathematical and Physical Pa]>e)-s, voL ii. p. 168. | 1 For a description of tlic mirrov galraacmeler. see art GiLViiiOMETEB, voirX. p. SO sq. TELEGRAPH 125. his firyt|v)init iii ISiJ?. Vulnn iho three succeeding yeai-s greal inipioveiiienU were clCticd on it, nml tlic instmnieut lias since tlwt tato been exclusively emitloyctl lit working most of tlio nioro important siibiiiarnie cables of the world,—indeed all except those on which the mil ror galvanometer iiiclhoj is in use. In the siphon iKorder (see hg 30) the indicator consists of a light rectangiUar signal coil of fine Hire, suspended be- tween the |x>les of two powerful elec-J tromagnets M, M so -IS to be free to move about its ? longer axis, which is verti-cal, ami so joined that the Electric signal tT* currents through the cable pass through it. A fine glass siphon tube is suspended with ^ freedom to move in only one degree, and is con-nected with the sig- tia
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Keywords: ., bookcentury1800, bookdecade1890, bookidencyclopedia, bookyear1892
