I should not have offered more on this subject than the labelled specimen, had I not made a most satisfactory experiment with this kind of fuel, which may be obtained in great abundance in our own State. It is easily kindled; burns with a bright flame; yields a bluish smoke, and produces an odour similar to that which attends the combustion of gramineous substances. But this is momentary. When thoroughly kindled, it burns with less flame, yields a small proportion of blackish smoke, and sulphurous acid gas is evolved, though I cannot discover any pyrites. It burns for a long time, and emits a great body of heat. It leaves a very small proportion of light, grayish white ashes; on which I have as yet made no experiments, having this day, for the first time, paid particular attention to this substance, attracted by the unusual hardness which it acquired since it is in my possession: and not many hours have elapsed since I subjected it to combustion. The attempt succeeded so well, that I cannot refrain from expressing my opinion, that this variety of peat will answer as an excellent substitute for the best Liverpool coal. ART. VIII. _Notices of Geology in the West-Indies._ REMARKS. In the former Number of this work, a notice was published respecting siliceous petrifactions of wood, from Antigua. We now publish a geological sketch of the island, with notices of some other parts of the West Indies. This communication is made by a friend, with permission to publish it. It is a production of the pen of Dr. NUGENT, of St. Johns, Antigua, a gentleman of eminent scientific acquirements, who, it is hoped, will continue his laudable and able efforts to illustrate the natural history of the West-Indies. _Memorandum concerning the Geology of Antigua, &c._ The southern and more mountainous part of the island consists of _trap_ rocks; more particularly of trap breccia and wacké-porphyry. On these beds rests a series of very peculiar stratified conglomerate rocks. These strata vary exceedingly in colour and thickness, but all dip, at a considerable angle, to the northwest. The more usual character of this rock, is that of a clayey basis, with minute particles of felspar, and small spots of _grünerde_[19] (or chlorite Baldogée.) This latter is frequently diffused over the whole, and gives it a green tinge: the colour has been thought by some to proceed from the impregnation of copper, but I am rather of opinion that is owing to manganese and iron. The conglomerate character of this rock, is derived from its having imbedded in it, or incorporated with it, numerous fragments, of all sizes, of petrified wood, chert, with and without coralline impressions, agate, jasper, amygdaloid, greenstone, hornstone, porphyry, porphyry slate, and other substances.