poses, and indeed for all the common usages of life, was produced by the combustion of wood, and of a black bituminous substance, or amphilites, drawn from the bowels of the earth, called coal, of which you may yet see specimens in the cabinets of the curious. As these substances decomposed, or rather expanded, by the force of heat, the attraction of cohesion was dissolved, and the component parts flew off in the shape of smoke or soot. This smoke, rising into the air, was dispersed by it, and the minute particles, or atoms, of which it was composed, falling and resting upon every thing that chanced to be in their way, produced that incomparable dusky hue, which the moderns have so often tried, though in vain, to imitate. I beg your pardon, Edric, for using such vulgar language to express what I wished to say, but really, treating upon such a subject, I did not know how to explain myself elegantly."
"Oh! I understood you very well, Sir. After all, the only true use of language is to convey the ideas of one person to the understanding of another; and, provided that end be at-
