Railway communications —Part II

Part 1 of the paper on Railway communications was published in the November, 1947, Transactions and described the arrangements made for communications in connection with the Royal tour of South Africa. Part 2 gives a description of the application of electrical communications and electronic methods to the South African Railways. Included are original work done on (a) the development of L section crossarms for replacing the long established tubular types, with the presentation of a short film showing the tests carried out, and a new staying system. (b) The production of a viscosity measuring instrument for dealing with opaque liquids, (c) The development of voice frequency repeaters for use in a special application for temporary purposes pending line reconstruction work.