which it has no interest, can obtain in the average but a scanty, precarious and diminishing subsistence; while to Labor working _with_ Machinery which it owns and directs, there are ample recompense, steady employment, and the prospect of gradual improvement. Such is one of the great truths confirmed by the lessons of the Crystal Palace. Another truth forcibly taught there is that of the steadiness of the march of Invention and the infinite capacity of the laws and forces of Nature to minister more and more readily and amply to the sustenance and comfort of Man. We are obviously as yet on the bare threshold of chemical discovery and mechanical contrivance for the benefit of Man. The inventor of the steam engine still lived within the memory of many of us; yet even he never dreamed of the stupendous improvements already made on his invention, and the infinite adaptations to human wants of which it is fully proved susceptible. A first-class North River or Sound Steam-boat, much more an Atlantic Steam-ship, would have astounded even _him_. But though the capacities of Steam are not half exhausted, we grow dissatisfied with its performance and impatient of its conditions; we demand its power without its weight, its bulk, its cost, its explosive tendencies, or rather those of the elements from which it is evolved—and Electricity, Air, Gunpowder, and other potencies are analyzed and interrogated in quest of the most advantageous substitute—a search which will ultimately achieve success. The only question is one of time. So in every department of mechanics and manufactures: The victory of to-day opens the path to grander and more beneficent victories to-morrow. There never was a single mind capable of conceiving and working out the idea of the Power Printing-Press of to-day, nor that of the best Carpet-Looms and Paper-Mills in use; each has been produced by gradual, step-by-step improvement; the goal of one inventor serving as the starting-point of his successor; and often an invention which failed to subserve its intended purpose has been found eminently useful in a very different sphere and connection; or, after having been cast aside as worthless, has supplied the necessary hint to another inventor, who has been guided by it to a new achievement of signal beneficence. No real penetration into the arcana of Nature’s forces was ever fruitless or unsuggestive. The unpractical side of a newly discovered scientific truth indicates the position and nature of the practical side as well. To my mind nothing is clearer than this—the immense strides and vast scope of invention and discovery during the last age, render morally certain the achievement of far more and greater triumphs during the like period just before us. The Railway and its train are by no means the utmost possibilities of over-land locomotion; the Telegraph is not the last word of electricity; the Steam-ship is not the acme of Ocean navigation. These ennobling triumphs herald others