There is no period in geological history so justly deserving of examination as this. To the coal beds then deposited Great Britain in a great measure owes national and mercantile greatness. Dr. Buckland, in speaking of this remote age, remarks in his Bridgewater Treatise, that "the important uses of coal and iron in administering to the supply of our daily wants, give to every individual among us, in almost every moment of our lives, a personal concern, of which but few are conscious, in the geological events of these very distant eras. We are all brought into immediate connection with the vegetation that clothed the ancient earth before one half of its actual surface had yet been formed. The trees of the primeval forests have not, like modern trees, undergone decay, yielding back their elements to the soil and atmosphere by which they have been nourished; but treasured up in subterranean store-houses, have been transformed into enduring beds of coal, which in these latter ages have been to man the sources of heat, and light, and wealth. My fire now burns with fuel, and my lamp is shining with the light of gas derived from coal, that has been buried for countless ages in the deep and dark recesses of the earth. We prepare our food, and maintain our forges and furnaces, and the power of our steam-engines, with the remains of plants of ancient forms and extinct species, which were swept from the earth ere the formation of the transition strata was completed. Our instruments of cutlery, the tools of our mechanics, and the countless machines which we construct by the infinitely varied applications of iron, are derived from ore, for the most part coeval with, or more ancient than the fuel, by the aid of which we reduce it to its metallic state, and apply it to innumerable uses in the economy of human life. Thus, from the wreck of forests that waved upon the surface of the primeval lands, and from ferruginous mud that was lodged at the bottom of the primeval waters, we derive our chief supplies of coal and iron, those two fundamental elements of art and industry, which contribute more than any other mineral production of the earth to increase the riches, and multiply the comforts, and ameliorate the condition of mankind." This may justly be styled the golden age of the pre-adamite world; the globe having now cooled to a sufficient temperature to promote the growth of plants without being injurious to them, is for the first time clothed in all the rich verdure of a tropical climate. Doubtless the earth would have presented a lovely aspect, had it been possible to have beheld it; the mighty forests unawakened by a sound save that of the sighing of the wind; the silent seas, in which the new-born denizens of the deep roamed at will; the vast inland lakes for ages unruffled but by the fitful breeze; all present to the mind's eye a picture of surpassing, solitary grandeur.