of this power, in careening ships and getting them afloat when aground. The following is Mr. Etzler's calculation on this head: To form a conception of the power which the tide affords, let us imagine a surface of 100 miles square, or 10,000 square miles, where the tide rises and sinks, on an average, 10 feet; how many men would it require to empty a basin of 10,000 square miles area, and 10 feet deep, filled with sea-water, in 6 hours and fill it again in the same time? As one man can raise 8 cubic feet of seawater per minute, and in 6 hours 3,000, it would take 1,200,000,000 men, or as they could work only half the time, 2,400,000,000, to raise 3,000000,000,000 cubic feet, or the whole quantity required in the given time. This power may be applied in variA large body, of the heaviest materials that will float, may first, be raised by it, and being attached to the end of a balance reaching from the land, or from a stationary support, fastened to the bottom, when the tide falls, the whole weight will be brought to bear upon the end of the balance. Also when the tide rises it may be made to exert a nearly equal force in the opposite direction. It can be employed whenever a point d'appui can be obtained. ous ways. "However, the application of the tide being by establishments fixed on the ground, it is natural to begin with them near the shores in shallow water, and upon sands, which may be extended gradually further into the sea. The shores of the continent, islands, and sands, being generally surrounded by shallow water, not exceeding from 50 to 100 fathoms in depth, for 20, 50, or 100 miles and upward. The coasts of North America, with their extensive sand-banks, islands, and rocks, may easily afford, for this purpose, a ground about 3,000 miles long, and, on an average, 100 miles broad, or 300,000 square miles, which, with a power of 240,000 men per square mile, as stated, at 10 feet tide, will be equal to 72,000 millions of men, or for every mile of coast, a power of 24,000,000 men. Rafts, of any extent, fastened on the ground of the sea, along the shore, and stretching far into the sea, may be covered with fertile soil, bearing vegetables and trees, of every description, the finest gardens, equal to those the firm land may admit of, and buildings and machineries, which may operate, not only on the sea, where they are, but which also, by means of mechanical connections, may extend their operations for many miles into the continent. (Etzler's Mechanical System, page 24.) Thus this power may cultivate the artificial soil for many miles upon the for several miles, the dry land, along the surface of the sea, near the shores, and, shore, in the most superior manner ima ginable; it may build cities along the shore, consisting of the most magnificent palaces, every one surrounded by gardens and the most delightful sceneries; it may level the hills and unevennesses, or raise eminences for enjoying open prospect into the country and upon the sea; it may cover the barren shore with fertile soil, and beautify the same in various ways; it may clear the sea of shallows, and make easy the approach to the land, not merely of vessels, but of large floating islands, which may come from, and go to distant parts of the world, islands that have every ants which the firm land affords." commodity and security for their inhabit "Thus may a power, derived from the gravity of the moon and the ocean, hitherto but the objects of idle curiosity to the studious man, be made eminently subservient for creating the most delightful abodes along the coasts, where men may enjoy at the same time all the advantages of sea and dry land; the coasts may hereafter be continuous paradisiacal skirts between land and sea, everywhere crowded with the densest population. The shores and the sea along them will be no more as raw nature presents them now, but everywhere of easy and charming access, not even molested by the roar of waves, shaped as it may suit the purposes of their inhabitants; the sea will be cleared of every obstruction to free passage everywhere, and its productions in fishes, etc., will be gathered in large, appropriate receptacles, to present them to the inhabitants of the shores and of the sea." Verily, the land would wear a busy aspect at the spring and neap tide, and these island ships-these terre infirma-which realise the fables of antiquity, affect our imagination. We have often thought that the fittest locality for a human dwelling was on the edge of the land, that there the constant lesson and impression of the sea might sink deep into the life and character of the landsman, and perhaps impart a marine tint to his imagination. It is a noble word, that mariner-one who is conversant with the sea. There should be more of what it signifies in each of us. It is a worthy country to belong to we look to see him not disgrace it. Perhaps we should be equally mariners and terreners, and even our Green Mountains need some of that sea-green to be mixed with them. The computation of the power of the waves is less satisfactory. While only the average power of the wind, and the average height of the tide, were taken before now, the extreme height of the waves is used, for they are made to rise ten feet above the level of the sea, to which, adding ten more for depression, we have twenty feet, or the extreme height of a wave. Indeed, the power of the waves, which is produced by the wind blowing obliquely and at disadvantage upon the water, is made to be, not only three thousand times greater than that of the tide, but one hundred times greater than that of the wind itself, meeting its object at right angles. Moreover, this power is measured by the area of the vessel, and not by its length mainly, and it seems to be forgotten that the motion of the waves is chiefly undulatory, and exerts a power only within the limits of a vibration, else the very continents, with their extensive coasts, would soon be set adrift. Finally, there is the power to be derived from Sunshine, by the principle on which Archimedes contrived his burning mirrors, a multiplication of mirrors reflecting the rays of the sun upon the same spot, till the requisite degree of heat is obtained. The principal aplication of this power will be to the boiling of water and production of steam. "How to create rivulets of sweet and wholesome water, on floating islands, in the midst of the ocean, will be no riddle now. Sea-water changed into steam, will distil into sweet water, leaving the salt on the bottom. Thus the steam engines on floating islands, for their propulsion and other mechanical purposes, will serve, at the same time, for the distillery of sweet water, which, collected in basins, may be led through channels over the island, while, where required, it may be refrigerated by artificial means, and changed into cool water, surpassing, in salubrity, the best spring water, because nature hardly ever distils water so purely, and without admixture of less wholesome matter." vious powers, already used to a trifling. extent. But there are innumerable others in nature, not described nor discovered. These, however, will do for the present. This would be to make the sun and the moon equally our satellites. For, as the moon is the cause of the tides, and the sun the cause of the wind, which, in turn, is the cause of the waves, all the work of this planet would be performed by these far influences. "But as these powers are very irregalar and subject to interruptions; the next object is to show how they may be converted into powers that operate continually and uniformly for ever, until the machinery be worn out, or, in other words, "Hitherto into perpetual motions.".. the power of the wind has been applied immediately upon the machinery for use, and we have had to wait the chances of the wind's blowing; while the operation was stopped as soon as the wind ceased to blow. But the manner, which I shall state hereafter, of applying this power, is to make it operate only for collecting or storing up power, and then to take out of this store, at any time, as much as may be wanted for final operation upon the machines. The power stored up is to react as required, and may do so long after the original power of the wind has ceased. And though the wind should cease for intervals of many months, we may have by the same power a uniform perpetual motion in a very simple way." up gives us an image of reaction. The "The weight of a clock being wound sinking of this weight is the reaction of winding it up. It is not necessary to wait till it has run down before we wind up the weight, but it may be wound up at any time, partly or totally; and if done always before the weight reaches the bottom, the clock will be going perpetually. In a similar, though not in the same way, we may cause a reaction on a larger scale. We may raise, for instance, water by the immediate application of wind or steam to a pond upon some eminence, out of which, through an outlet, it may fall upon some wheel or other contrivance for set ting machinery a going. Thus we may store up water in some eminent pond, and take out of this store, at any time, as much water through the outlet as we want to employ, by which means the original power may react for many days after it has ceased."... "Such reservoirs of moderate elevation or size need not be made artificially, but will be found made So much for these few and more ob- by nature very frequently, requiring but The greater the height, of course the less water required. But suppose a level and dry country; then hill and valley, and "eminent pond," are to be constructed by main force; or if the springs are unusually low, then dirt and stones may be used, and the disadvantage arising from friction will be counterbalanced by their greater gravi ty. Nor shall a single rood of dry land be sunk in such artificial ponds as may be wasted, but their surfaces 'may be covered with rafts decked with fertile earth, and all kinds of vegetables which may grow there as well as anywhere else." And finally, by the use of thick envelopes retaining the heat, and other contrivances, "the power of steam caused by sunshine may react at will, and thus be rendered perpetual, no matter how often or how long the sunshine may be interrupted. (Etzler's Mechanical System)." Here is power enough, one would think, to accomplish somewhat. These are the powers below. Oh ye millwrights, ye engineers, ye operatives and speculators of every class, never again complain of a want of power; it is the grossest form of infidelity. The question is not how we shall execute, but what. Let us not use in a niggardly manner what is thus generously of fered. Consider what revolutions are to be effected in agriculture. First, in the new country, a machine is to move along taking out trees and stones to any required depth, and piling them up in convenient heaps; then the same machine," with a little alteration," is to plane the ground perfectly, till there shall be no hills nor valleys, making the requisite canals, ditches and roads, as it goes along. The same machine, "with some other little alterations," is then to sift the ground thoroughly, supply fertile soil from other places if wanted, and plant it; and finally, the same machine "with a little addition," is to reap and gather in the crop, thresh and grind it, or press it to oil, or prepare it any way for final use. "Any wilderness, even the most hidthe most fertile and delightful gardens. eous and sterile, may be converted into The most dismal swamps may be cleared of all their spontaneous growth, filled up and levelled, and intersected by canals, ditches and aqueducts, for draining them entirely. The soil, if required, may be meliorated, by covering or mixing it with rich soil taken from distant places, and the same be mouldered to fine dust, levelled, sifted from all roots, weeds and stones, and sowed and planted in the most beautiful order and symmetry, with fruit trees and vegetables of every kind that may stand the climate." New facilities for transportation and locomotion are to be adopted: "Large and commodious vehicles, for carrying many thousand tons, running over peculiarly adapted level roads, at the rate of forty miles per hour, or one thousand miles per day, may transport men and things, small houses, and whatever may serve for comfort and ease, by land. Floating islands, constructed of logs, or manner, as is to be done with stone, and of wooden-stuff prepared in a similar of live trees, which may be reared so as to interlace one another, and strengthen the whole, may be covered with gardens and palaces, and propelled by powerful engines, so as to run at an equal rate through seas and oceans. Thus, man may move, with the celerity of a bird's flight, in terrestrial paradises, from one climate to another, and see the world in all its variety, exchanging, with distant nations, the surplus of productions. The journey from one pole to another may be performed in a fortnight; the visit to a transmarine country in a week or two; or months by land and water. a journey round the world in one or two And why pass a dreary winter every year while there is yet room enough on the globe where nature is blessed with a perpetual summer, and with a far greater variety and luxuriance of vegetation? More than one-half the surface of the globe has no winter. Men will have it in their power to remove and prevent all bad influences of climate, and to enjoy, perpetually, only that temperature which suits their constitntion and feeling best." Who knows but by accumulating the power until the end of the present century, using meanwhile only the smallest allowance, reserving all that blows, all that shines, all that ebbs and flows, all that dashes, we may have got such a reserved accumulated power as to run the earth off its track into a new orbit, some summer, and so change the tedious vicissitude of the seasons? Or, perchance, coming generations will not abide the dissolution of the globe, but, availing themselves of future inventions in aerial locomotion, and the navigation of space, the entire race may migrate from the earth, to settle some vacant and more western planet, it may be still healthy, perchance unearthy, not composed of dirt and stones, whose primary strata only are strewn, and where no weeds are sown. It took but little art, a simple application of natural laws, a canoe, a paddle, and a sail of matting, to people the isles of the Pacific, and a little more will people the shining isles of space. Do we not see in the firmament the lights carried along the shore by night, as Columbus did? Let us not despair nor mutiny. "The dwellings also ought to be very different from what is known, if the full benefit of our means is to enjoyed. They are to be of a structure for which we have no name yet. They are to be neither palaces, nor temples, nor cities, but a combination of all, superior to whatever is known. Earth may be baked into bricks, or even vitrified stone by heat,— we may bake large masses of any size and form into stone and vitrified sub stance of the greatest durability, lasting even thousands of years, out of clayey earth, or of stones ground to dust, by the application of burning mirrors. This is to be done in the open air, without other preparation than gathering the substance, grinding and mixing it with water and cement, moulding or casting it, and bringing the focus of the burning mirrors of proper size upon the same. The character of the architecture is to be quite different from what it ever has been hitherto; large solid masses are to be baked or cast in one piece, ready shaped in any form that may be desired. The building may, therefore, consist of columns two hundred feet high and upwards, of proportionate thickness, and of one entire piece of vitrified substance; huge pieces are to be moulded so as to join and hook on to each other firmly, by proper joints and folds, and not to yield in any way without breaking. "Foundries, of any description, are to be heated by burning mirrors, and will require no labor, except the making of the first moulds and the superintendence for gathering the metal and taking the finished articles away." Alas, in the present state of science, we must take the finished articles away; but think not that man will always be a victim of circumstances. The countryman who visited the city and found the streets cluttered with bricks and lumber, reported that it was the endless repairs and reforming of our not yet finished, and one who considers will be done. But why may not the houses, might well wonder when they dwellings of men on this earth be built once for all of some durable material, some Roman or Etruscan masonry which will stand, so that time shall only adorn and beautify them? Why may we not finish the outward world for posterity, and leave them leisure to attend to the inner? Surely, all the gross necessities and economies might be cared for in a few years. All might be built and baked and stored up, during this, the term-time of the world, against the vacant eternity, and the globe go provisioned and furnished like our public vessels, for its voyage through space, as through some Pacific ocean, while we would "tie up the rudder and sleep before the wind,” as those who sail from Lima to Manilla. But, to go back a few years in imagination, think not that life in these crystal palaces is to bear any analogy to life in our present humble cottages. Far from it. Clothed, once for all, in some "flexible stuff," more durable than George Fox's suit of leather, composed of "fibres of vegetables," "glutinated" together by some "cohesive substances," and made into sheets, like paper, of any size or form, man will put far from him corroding care and the whole host of ills. "The twenty-five halls in the inside of the square are to be each two hundred feet square and high; the forty corridors, each one hundred feet long and twenty wide; the eighty galleries, each from 1,000 to 1,250 feet long; about 7,000 private rooms, the whole surrounded and intersected by the grandest and most splendid colonnades imaginable; floors, ceilings, columns with their various beautiful and fanciful intervals, all shining, and reflecting to infinity all objects and persons, with splendid lustre of all beautiful colors, and fanciful shapes and pictures. All galleries, outside and within the halls, are to be provided with many thousand commodious and most elegant vehicles, in which persons may move up and down, like birds, in perfect security, and without exertion. Any member may procure himself all the common articles of his daily wants, by a short turn of some crank, without leaving his apartment; he may, at any time, bathe himself in cold or warm water, or in steam, or in some artificially prepared liquor for invigorating health. He may, at any time, give to the air in his apartment that temperature that suits his feeling best. He may cause, at any time, an agreeable scent of various kinds. He may, at any time, meliorate his breathing_air, that main vehicle of vital power. Thus, by a proper application of the physical knowledge of our days, man may be kept in a perpetual serenity of mind, and if there is no incurable disease or defect in his organism, in constant vigor of health, and his life be prolonged beyond any parallel which pre sent times afford. "One or two persons are sufficient to direct the kitchen business. They have nothing else to do but to superintend the cookery, and to watch the time of the victuals being done, and then to remove them, with the table and vessels, into the dining-hall, or to the respective private apartments, by a slight motion of the hand at some crank. Any extraordinary desire of any person may be satisfied by going to the place where the thing is to be had; and anything that requires a particular preparation in cooking or baking, may be done by the person who desires it." This is one of those instances in which the individual genius is found to consent, as indeed it always does, at last, with the universal. These last sentences have a certain sad and sober truth, which reminds us of the scripture of all nations. All expression of truth does at length take the deep ethical form. Here is hint of a place the most eligible of any in space, and of a servitor, in comparison with whom, all other helps dwindle into insignificance. We hope to hear more of him anon, for even crystal palace would be deficient without his invaluable services. And as for the environs of the establishment, "There will be afforded the most en rapturing views to be fancied, out of the from the roof, from its turrets and cupoprivate apartments, from the galleries, las,-gardens as far as the eye can see, full of fruits and flowers, arranged in the most beautiful order, with walks, colonnades, aqueducts, canals, ponds, plains, amphitheatres, terraces, fountains, sculptural works, pavilions, gondolas, places for public amusement, etc., to delight the The walks and roads are to be paved eye and fancy, the taste and smell." with hard vitrified, large plates, so as to be always clean from all dirt in any weather or season. . . . The channels being of vitrified substance, and the watilled if required, may afford the most ter perfectly clear, and filtrated or disbeautiful scenes imaginable, while a variety of fishes is seen clear down to the bottom playing about, and the canals may afford at the same time, the means of gliding smoothly along between various sceneries of art and nature, in beautiful gondolas, while their surface and borders may be covered with fine land and aquatic birds. The walks may be covered with porticos adorned with magnificent columns, statues and sculptural works; all of vitrified substance, and lasting for ever, while the beauties of nature around heighten the magnificence and deliciousness." "The night affords no less delight to fancy and feelings. An infinite variety and sceneries, radiating with crystalline of grand, beautiful and fanciful objects brilliancy, by the illumination of gaslight; the human figures themselves, arrayed in the most beautiful pomp fancy may suggest, or the eye desire, shining even with brilliancy of stuffs and diamonds, like stones of various colors, elegantly shaped and arranged around the body; all reflected a thousand-fold in huge mirrors and reflectors of various forms; theatrical scenes of a grandeur and magnificence, and enrapturing illusions, unknown yet, in which any person may be either a spectator or actor; the speech and the songs reverberating with increased sound, rendered more sonorous and that are moveable into any shape at any harmonious than by nature, by vaultings time; the sweetest and most impressive harmony of music, produced by song and instruments partly not known yet, may thrill through the nerves and vary with other amusements and delights. "At night the roof, and the inside and outside of the whole square, are illuminated by gas-light, which in the mazes of |