That the electric light has not proved a failure may be gleaned from a rough survey of what has been done during the past two years, in spite of unmerited depression and depreciation. In this country, permanent installations have been established at several theatres in London and the provinces; the Royal Courts of Justice, the Houses of Parliament, Buckingham Palace, Windsor Castle, the Bank of England, and other well-known buildings; while numerous railway stations, hotels, clubs, factories, and private mansions throughout the country, have also adopted the new light either entirely or in part. In addition to this, over forty steamships have been fitted with the electric light during the past year; and the Holborn Viaduct, with its shops and buildings, has been lighted without interruption for the past two years. On the continent, in addition to a large number of factories, private houses, and public buildings, numerous theatres at Paris, Munich, Stuttgart, Brunn, Vienna, Berlin, Prague, and Milan have been electrically lighted. In New York, an installation of ten thousand lights has been successfully running for the last year or two. Any one wishing to see the electric light to advantage and its suitability to interior decoration, should visit the Holborn Restaurant. This building, with its finely decorated rooms, its architectural beauties, and ornamental designs in the renaissance style, when viewed by the electric light, is without doubt one of the chief sights of London. The electric light in the form of the well-known powerful and dazzling arc-light is the favourite illuminant for lighting harbours, railway stations, docks, public works, and other large spaces. But it is to the incandescent lamp that one must look par excellence for the ‘light of the future.’ It has been satisfactorily established that lighting by incandescence is as cheap as lighting by gas, provided that it be carried out on an extensive scale. Very contradictory statements have from time to time been published as to the relative cost of lighting by electricity and gas; and a few remarks on the subject, without entering into detailed figures, will explain much of this discrepancy. These remarks will refer to electric lighting by incandescence.