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Evening Post, Volume CVI, Issue 105, 31 October 1923, Page 12

The good that the electrical industry and the electrical transmission of power' are doing for mankind can best be realised by these figures. A single 220,000-volt" transmission :wire' can transport three' hundred miles in a year energy equiva- ■ lent to one million tons of coal'! A mil- \ lion-volt line could transport one thousand miles energy equivalent to twentyhve million tons of coal! Finland's largest hydro-electric power station, harnessing the energy of the Vuoksen Rapids, is well under way. The total head is to be utilised in four steps, llie second .being now under construction. When the plan is fully realised there will be a yield of 392,000 turbine horse. , power, with a possibility of increasing this to 680,000 horse-power through, controlling the water level of the Salma .Lakes. ■ Fuse wire,, commonly used for the protection of house-wiring against overloading with current, is made of tin. In come cases copper is used, and as that metal has a much' higher ■ conductivjtv than tin, a copper fuse k of much smaller gauge than a- tin One for the came curPent capacity. The melting point of copper is also much higher than "that of^in, and when.it "blows," theeffed is more explosive. •• ' : : <