ECONOMIES IN COAL.
mlin EDITOR OP TILE "SPUOTATOR.7] SIR,—Since I saw over a ton of coal-dust sold for a more song at a private sale the other day I have been .experis menting with the few hundredweight of coal-dust in my own cellar. First I mixed some of the dust with wet clay and when dry put these balls on the kitchen fire. • The cook wanted to give notice. The next experiment was to mix the dust with boiled tar. This method certainly set a good fire going, but it might also include the chimney, and cannot be recommended. The most satisfactory result was obtained by pouring a pint of water into a housemaid's small box filled with coal-dust, and then feeding the fire with small shovelfuls from time to time. This method, however, has many grave drawbacks. As there must be many hundreds, if not thousands, of tons of coal-dust lying to waste in London cellars alone, it would be of public interest to learn of some satisfactory method by which this waste coal can be used on the domestic hearth.—I am, Sir, Sze., Homo,
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