labor of countless hosts; which enables us to penetrate into the secret recesses of the solid earth, and to master the ocean, and the very elements themselves. "It rows, it pumps, it excavates, it carries, it draws, it lifts, it hammers, it spins, it weaves, it prints;"--that masterpiece of human skill, which, in the language of the celebrated Doctor Black, is the most valuable present ever made by philosophy to the arts. Again, when we behold materials of every known description, in the rude state in which nature presents them, before they have been subjected to the first elementary process in their manufacture, and look upon them, after they have undergone the various mechanical operations to which they are successively submitted, and are produced in a finished state, of every form and fashion that can minister to the wants, or gratify the caprice of man, we almost doubt their identity, and are at a loss which most to admire, the utility of the substance by means of which so wonderful a change has been effected, or the sagacity of him, who moulds and constructs it into complicated machines, to which he gives motion and almost life, to work out his own advantage. And, lastly, when there is displayed before us the endless variety of manufactured goods and wares;---of instruments, and implements, and utensils;--of machines, and engines, and mechanical contrivances to abridge human labor; when we gaze on the immense fleets that wait to receive them, in an hundred ports of some great manufacturing country, or survey the seas whitened with the sails, and heaving beneath the burthens of whole navies, busied in transporting them to distant and expectant nations, and even piloted in their course, through the wide and trackless waste of waters, with unerring accuracy, by a property peculiar to iron,--we turn from the contemplation more fully persuaded of the extent to which we are indebted to this single metal, to which in truth, if we except the spontaneous productions of nature, (of little comparative value unwrought,) we owe every thing we possess. We are enabled, perhaps, by this review, hasty though it has been, of the numerous and varied uses of iron, better to estimate its real worth, and we do not hesitate to assign to it, an importance among the elements of national prosperity of the highest order, and to consider it, what truly it is, the most valuable of all acquisitions. We look upon the country rich in the possession of its ores, with feelings of rivalry, and are prompted to emulate her in acquiring this true species of substantial wealth. Our national ambition is excited to grasp at this mighty instrument of power, and our energies should be roused into ceaseless activity, until, by untiring assiduity in surveying and exploring our own tempting regions, guided by the lights borrowed from geological science, we succeed in enlarging our mineral domain to at least an equal extent.