An Iluminating Lecture: Some Difficulties to be Overcome Mr, A. H. Gordon, representative in Shanghai of Callenders' Cable & Construction Ca., Ld., on Wednesday afternoon delivered a paper before members of the Y.M.C.A. on the making and laying of electric cables. The lecture, which was listened to appreciatively by a large audience, was. illustrated cinematograph pictures, while there was also a reel entitled "Wiring In" exhibited, this being a comic film showing the transformation in a house at home by transferring from gas lighting to electricity and the solution of all domestic troubles.
The following notes are taken from Mr. Gordon's paper The manufacture of electric cables is a most complicated process and few users of electricity can realize the labour involyed in the production of a thoroughly reliable article, when ther it is the common flexible, which connects the lamp to the ceiling, the heavy mains carrying electricity at high pressure underground or the lead the tube containing hundreds of pairs of telephone wires which one sees in all the principal towns of China running from pole to pole or which in the larger cities is placed underground.
Electricity is transmitted at high pressure in order to reduce the cost of- mains. Until a few years ago the highest pressure put underground was 6,600 v. ow, in Shanghai, electricity is transmitted by underground mains at 22,000 v. The present record for high voltage underground transmission is 55,000 v. Cables are being laid in Holland for this working pressure.
Text read from the printed page and cleaned; old type leaves the occasional error.