“At each point where electric light is used, the electric lamps or groups of such lamps are fed by the secondary coil or coils of an induction apparatus placed there. The primary coils of all the induction apparatus are in the common circuit of one main lead, which is in connection with a battery or a magneto-electric machine placed in some suitable situation. The size and length of the primary and secondary coils of each induction apparatus is determined according to the number of lamps at each point, where the secondary current shall supply the electric lighting.” [Sidenote: E. Edwards & A. Normandy, 1878.] The employment of induction coils for the distribution of light, heat, and power was patented in England in the same year by Edmund Edwards and Alphonse Normandy. Among other matter in this patent there is as follows:— “At or near every point where it is required that a light shall be produced, we arrange a coil (or series of coils) of insulated metallic wire or ribbon (preferably surrounding a bar or wires of soft iron), through which coil or coils the current from the principal wire first described can be passed when desired, or cut off by means of a key or lever. Round, or adjacent to, each coil of insulated wire described, we form one or more secondary coils of insulated metallic wire, or ribbon, arranged so that the passage of the rapidly intermittent current of electricity, as described, through the primary coil or coils, generates a corresponding current of electricity in each of the secondary coils.” [Illustration: FIG. 13.] [Sidenote: Strumbo, 1878.] In the same year, Strumbo had also constructed a secondary generator like that of Gaulard, and a description of it was contained in the newspaper ‘Le Monde,’ of 24th October, 1878. It is of note in this apparatus, which we have illustrated in Fig. 13, that the primary and secondary wires were wound side by side, and that both coils had the same relative position to the iron core. [Sidenote: Harrison, 1878.] Harrison also, in the same year, took out a patent having the same object as his of the year 1857. Both patents proposed the connection of induction coils in series. This is especially clearly mentioned in the latter of these, as there he says that both induction coils are put in circuit at intervals along the main lead, or primary circuit, so that one or more coils are near the places where lamps are to be fed. [Sidenote: Meritens, 1878.] We find in Meritens’ English patent, No. 5257, of the year 1878, the series connection of primary coils in the dynamo-circuit also described.