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I do not know of any Corliss manufacturers who are willing to do any better. This 'consolation stakes' is regarded as a better test of originality than the tripos. In a station of this kind, the actual coal consumed per unit of output at the dynamos is considerably larger than is shown in a direct test where we charge the engines only with the coal it uses directly. What is an imbalance of charge? The weekly records from stations of this class charge the horsepower output with all the coal used by the engine, pumps, condensers, well pumps, cleaning fires, blowing-off boilers, etc., and where the former item is about three pounds of coal per horse power per hour, we have in the latter case, making no allowance for the engine running empty, a result fifty per cent, greater than this. The electrician knew that the mistral would blow before long, and, as it rarely blows for less than three days at a time, that rather rude wind, so dreaded by the Marseillaise, was doubly dreaded by him. India-rubber had been tried by Jacobi, the Russian electrician, as far back as 1811. He laid a wire insulated with rubber across the Neva at St. Petersburg, and succeeded in firing a mine by an electric spark sent through it; but india-rubber, although it is now used to a considerable extent, was not easy to manipulate in those days.

Visitors in holiday attire collected in groups to watch the operations, and eagerly joined with his excellency in helping to pull the wire ashore. Blue : Phase 3 or distribution of power wire. The Cambridge Mathematical Journal of 1842 contains a paper by him-'On the uniform motion of heat in homogeneous solid bodies, and its connection with the mathematical theory of electricity.' In this he demonstrated the identity of the laws governing the distribution of electric or magnetic force in general, with the laws governing the distribution of the lines of the motion of heat in certain special cases. We here obtain at a premium of cost the most flexible system and local distribution from house to house, which has no equal It enables you to take off services for local distribution from every twenty feet without in any way affecting the insulation on the main line, and being able at any time to disconnect these services and restore the main to its original condition.

As long as we can hold a moderate insulation with good mechanical protection, that is all we want. What we desire is not such a high insulation as good mechanical protection. Assume, for the sake of argument, that we can save five or ten per cent, in steam economy; if this is obtained at a cost, the interest of which amounts to more than this, we are obtaining it for no good whatever; furthermore, there are many other problems in electric light stations which we have to carefully consider in this question of steam plant, one of which has been enumerated before, viz., the question of reliability in operation, and always being ready for service. The writer knows of one station in which we have the latter figure, and where, if we eliminate one short half-hour around six o'clock, we have the remarkable showing of seventy-five per cent. Usually the former refers to a single, solid metallic conductor, with or without insulation, while the latter refers to a stranded conductor or to an assembly of insulated conductors.

Faraday and Wheatstone soon discovered its merits as an insulator, and in 1845 the latter suggested that it should be employed to cover the wire which it was proposed to lay from Dover to Calais. The conductor in the wire provides the conducting path to the cables. It was tried on a wire laid across the Rhine between Deutz and Cologne. Added to this, we have the advantage of direct connection to our generators, avoiding , all the intricacies of shafting, etc., and the unreliability they entail. We have also the advantage of quick steaming under heavy changes in load. Then we have the illustration of clubs, theatres, churches, concerts and residences, lighting after supper, bringing up the load to its maximum point between eight and nine o'clock. Even where we have a more constant load, as iii exclusive arc lighting on municipal circuits. We find, however, that they are now even building them to work up as high as 125 pounds boiler pressure. We have two classes of boilers prominently before us for this work.

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