In whatever direction we turn our eyes, we behold some triumph of mind over matter. We cannot see a ship, a book, a gun, a watch—scarcely the commonest implement or utensil—without being made sensible of the wonders achieved by human science and art,—the result of the combined efforts of a thousand minds and ten thousand hands, embodied in a form that has added incalculably to man's power and enjoyment. If we take the departments of knowledge separately, we are filled with admiration at the labor by which it has climbed, and the elevation it has attained. Astronomy, not content with teaching us the motions of the planets and moons of our system, and by them, enabling us to traverse the pathless ocean with the certainty with which we travel by land—of itself a glorious achievement of science—now undertakes to estimate the weight and density of these bodies—their influence on one another—of the smallest on the largest—the flight of comets, and even some of the changes of position in the stars themselves. Optics has taught us new laws of light, and has subjected the most subtle and the most rapid body in nature to measurements, of as much certainty as the gross portions of matter. We now know the weight, density, motions, elasticity of the air we breathe, and which encompasses the earth; the laws of sound—its velocity, force, repercussion, musical tone. By electricity, magnetism, galvanism, are revealed to us new fluids of the existence of which we did not formerly dream. Their laws have been investigated with all the accuracy, acuteness and unwearied diligence which belongs to modern science; and though this branch of physics is every day receiving new accessions, it already forms a copious science of itself. While yet in the full career of discovery, it affords persuasive evidence of the close affinity if not identity of light, heat, magnetism, electricity and galvanism.
The progress of chemistry, shows us the growth of the human intellect in its numerous useful results. In the power it has acquired over brute matter, it has added infinitely to our means of comfort or enjoyment, by improving the useful arts of husbandry, metallurgy, dying, bleaching, tanning, brewing and medicine. Some of these improvements have, indeed, been the effect of accident; but many, nay the most of them, have been the result of human inquiry and sagacity. And the atomic theory, which gives us an insight into some of the primary laws of matter, is a pure deduction of reason.
By chemical discoveries, useful processes which once required months, or even years, are now effected in a few days. The chemist has found means to separate one of several properties from a drug, so that its medicinal effect may be undiminished and unaffected by other combined properties originally with it. Light, which formerly was furnished only by the valuable substances of wax, tallow, spermaceti or oil, has been supplied of a better quality, from the cheapest and most abundant objects in nature; and these improvements are but the precursors of the more splendid retinue which are hereafter destined to make their appearance. This science gives us assurance that all those substances which are most indispensable to man, because they repair the waste which is unceasingly going on in his bodily frame, are dispersed in boundless profusion throughout the universe, but under forms and combinations which conceal them from our unassisted senses; and that it may be within the scope of human art to separate those which are nutritious, and assimilate with our system, from those that are of a noxious or neutral character, and thus to modify the law which has hitherto limited the numbers of mankind. It is now thought whatever vegetable substances can be made soluble can be made digestible, in proof of which, a German chemist3 has already succeeded in converting ligneous substances into wholesome aliment; and it has long been known that sugar may be made by a similar chemical conversion. What would have been the transmutation for which the alchemist of former days consumed so many anxious days and sleepless nights, compared with these? Gold owes its extraordinary value to its scarcity, and had the adept succeeded in making it at pleasure, he would have lessened its value in the same proportion as he increased the quantity. If he could have converted copper into gold, the gold would have been worth no more than the copper, except for the expense of the transmutation. And if society had gained some advantage in being able to substitute it for metals that are liable to rust, yet it would have lost as much by the destruction of its property of containing great value in a small bulk, and its consequent unfitness to perform the functions of money.
3 Professor Autenrieth of Tubingen.
It is not improbable that some of these splendid visions of science may never be realized: but then other discoveries and improvements may take place of equal and greater importance; and should those hopes be verified, would they exhibit a greater triumph of art than has been witnessed in our day? they are certainly not more beyond the bounds of seeming probability than balloons, and diving bells, and rail roads, would have appeared to a former age.
The most extravagant fancy in which the man of science has indulged would scarcely exceed the wonders now wrought by steam, whether we consider the simplicity of the means, or the magnitude of the results. When in every vessel of heated water mankind had always seen a vapor arise, who could have supposed that in this simple fact, nature had furnished an agent, which by skilfully managing, he could multiply his natural strength a thousand fold, and move from place to place with the swiftness of a bird? By the alternate production and condensation of this vapor, which he is able to do by the very common agents of fire and water, he is able to extract the ponderous minerals from the bowels of the earth, having made it previously drain off the water which put them out of his reach. By the same power he fashions the metal he has made, into bars, or sheets, or rods, according to his various purposes. By it he performs all those operations which require incessant action as well as preterhuman strength; and thus it is made to spin and weave, to saw and bore and plane. By this he grinds his flour, cuts and polishes marble, prints newspapers, and transfers both himself and his commodities from place to place, by land or by water, with a rapidity which had existed only in the creations of an eastern imagination; and what is no less admirable, with a diminution of fatigue equal to the increase of speed.
The kindred sciences of geology and mineralogy have undergone the same improvements as that of chemistry. And by a course of inductive reasoning, founded on careful observation, the changes which the outer crust of our earth, to the small comparative extent that we are able to penetrate it, have been most satisfactorily shown, and referred to their several chemical or mechanical agents. It has also afforded data from which important facts in the history of organized beings have been deduced, and thus it has shed a light on a branch of knowledge from which it seemed most remote. The notion which once prevailed, that no species of animals is extinct, has been incontestibly disproved; and it has shown not only that there were many species which not only do not now exist, but which could not subsist in the present state of the world. Where important facts have not been discovered by human reason, we see its power exerted in profiting by those which accident has suggested; as in Galvani's discovery and that of Haüy in crystallography, of vaccination and many others.
Of all the branches of human knowledge there is no one which sooner exercised the understandings of men than that of medicine, first as a practical art, and then as a science, as there is none to which he is impelled by stronger motives; and accordingly we find it practised by a separate clan, in some of the rudest nations. Yet long and diligently as it has been cultivated, it has made prodigious advances of late years, and human reason has here too achieved its accustomed triumphs. In the surgical branch diseases are cured every day, often too by young and inexperienced operators, that were once deemed immedicable, and often proved fatal. The materia medica has been improved both by happy accidents, and the scientific labors of the chemist—and the science, trusting only to cautious observation and experiment, has profited as much by what it has rejected from the catalogue of sanative remedies, as what it has added. Reason has here taken the place of superstition and blind credulity, and few prescriptions are now made on purely empirical grounds. We have the most conclusive evidence of the advance of the medical science, in the greater average length of life now, compared with former periods. It has in England increased in 31 years from 1 in 33 to 1 in 58. A similar increase has been found to have taken place in every nation of Europe. In Great Britain, France and Germany, the average increase has been from 1 in 30 to 1 in 38 in less than two generations. And if a part of this melioration may be attributed to the moral improvement of men, to the greater wealth and comfort of a greater number, the diminution of intemperance and other vices, a part also seems fairly attributable to the medical science; but in either way it attests the progress of reason and philosophy.
The progress of those sciences which exercise no other faculty but the reason, also attest the increase and vigor of the human faculties. Algebra is not only more generally cultivated than in a former age, but it is now applied to every species of regular form and motion that matter can assume, and has thus reached conclusions which seemed unattainable by human skill; and the calculus which one generation readily performs, was scarcely intelligible to that which preceded it.
Even our most familiar and household concerns show the increased influence of reason over our actions. The dress of both sexes is more conformable to nature than formerly, and less biassed by caprice and arbitrary or accidental forms. I need only, by way of proof, refer to hair powder and buckles, and the tight ligatures which once bound our limbs or bodies, but bind them no longer. Forms have been discarded or abridged and made subservient to convenience—our modes of eating, drinking and sleeping—all the ordinary habits of social life prove the growing ascendancy of reason over habit and prejudice. Though in all of these we may occasionally see some retrograde steps.