Night and day are all one, for the magnetic light increases automatically as the day-light wanes; and the business parts of the city swarm as much at midnight as at high noon. In the old times, I am told, part of the streets was reserved for foot-paths for men and women, while the middle was given up to horses and wheeled vehicles; and one could not pass from side to side without danger of being trampled to death by the horses. But as the city grew it was found that the pavements would not hold the mighty, surging multitudes; they were crowded into the streets, and many accidents occurred. The authorities were at length compelled to exclude all horses from the streets, in the business parts of the city, and raise the central parts to a level with the sidewalks, and give them up to the exclusive use of the pedestrians, erecting stone pillars here and there to divide the multitude moving in one direction from those flowing in another. These streets are covered with roofs of glass, which exclude the rain and snow, but not the air. And then the wonder and glory of the shops! They surpass all description. Below all the business streets are subterranean streets, where vast trains are drawn, by smokeless and noiseless electric motors, some carrying passengers, others freight. At every street corner there are electric elevators, by which passengers can ascend or descend to the trains. And high above the house-tops, built on steel pillars, there are other railroads, not like the unsightly elevated trains we saw pictures of in our school books, but crossing diagonally over the city, at a great height, so as to best economize time and distance.

The whole territory between Broadway and the Bowery and Broome Street and Houston Street is occupied by the depot grounds of the great inter-continental air-lines; and it is an astonishing sight to see the ships ascending and descending, like monstrous birds, black with swarming masses of passengers, to or from England, Europe, South America, the Pacific Coast, Australia, China, India and Japan.

These air-lines are of two kinds: the anchored and the independent. The former are hung, by revolving wheels, upon great wires suspended in the air; the wires held in place by metallic balloons, fish-shaped, made of aluminium, and constructed to turn with the wind so as to present always the least surface to the air-currents. These balloons, where the lines cross the oceans, are secured to huge floating islands of timber, which are in turn anchored to the bottom of the sea by four immense metallic cables, extending north, south, east and west, and powerful enough to resist any storms. These artificial islands contain dwellings, in which men reside, who keep up the supply of gas necessary for the balloons. The independent air-lines are huge cigar-shaped balloons, unattached to the earth, moving by electric power, with such tremendous speed and force as to be as little affected by the winds as a cannon ball. In fact, unless the wind is directly ahead the sails of the craft are so set as to take advantage of it like the sails of a ship; and the balloon rises or falls, as the birds do, by the angle at which it is placed to the wind, the stream of air forcing it up, or pressing it down, as the case may be. And just as the old-fashioned steam-ships were provided with boats, in which the passengers were expected to take refuge, if the ship was about to sink, so the upper decks of these air-vessels are supplied with parachutes, from which are suspended boats; and in case of accident two sailors and ten passengers are assigned to each parachute; and long practice has taught the bold craftsmen to descend gently and alight in the sea, even in stormy weather, with as much adroitness as a sea-gull. In fact, a whole population of air-sailors has grown up to manage these ships, never dreamed of by our ancestors. The speed of these aerial vessels is, as you know, very great--thirty-six hours suffices to pass from New York to London, in ordinary weather. The loss of life has been less than on the old-fashioned steamships; for, as those which go east move at a greater elevation than those going west, there is no danger of collisions; and they usually fly above the fogs which add so much to the dangers of sea-travel. In case of hurricanes they rise at once to the higher levels, above the storm; and, with our increased scientific knowledge, the coming of a cyclone is known for many days in advance; and even the stratum of air in which it will move can be foretold.

I could spend hours, my dear brother, telling you of the splendor of this hotel, called The Darwin, in honor of the great English philosopher of the last century. It occupies an entire block from Fifth Avenue to Madison Avenue, and from Forty-sixth Street to Forty-seventh. The whole structure consists of an infinite series of cunning adjustments, for the delight and gratification of the human creature. One object seems to be to relieve the guests from all necessity for muscular exertion. The ancient elevator, or "lift," as they called it in England, has expanded until now whole rooms, filled with ladies and gentlemen, are bodily carried up from the first story to the roof; a professional musician playing the while on the piano--not the old-fashioned thing our grandmothers used, but a huge instrument capable of giving forth all sounds of harmony from the trill of a nightingale to the thunders of an orchestra. And when you reach the roof of the hotel you find yourself in a glass-covered tropical forest, filled with the perfume of many flowers, and bright with the scintillating plumage of darting birds; all sounds of sweetness fill the air, and many glorious, star-eyed maidens, guests of the hotel, wander half seen amid the foliage, like the houris in the Mohammedan's heaven.

But as I found myself growing hungry I descended to the dining-room. It is three hundred feet long: a vast multitude were there eating in perfect silence. It is considered bad form to interrupt digestion with speech, as such a practice tends to draw the vital powers, it is said, away from the stomach to the head. Our forefathers were expected to shine in conversation, and be wise and witty while gulping their food between brilliant passages. I sat down at a table to which I was marshaled by a grave and reverend seignior in an imposing uniform. As I took my seat my weight set some machinery in motion. A few feet in front of me suddenly rose out of the table a large upright mirror, or such I took it to be; but instantly there appeared on its surface a grand bill of fare, each article being numbered. The whole world had been ransacked to produce the viands named in it; neither the frozen recesses of the north nor the sweltering regions of the south had been spared: every form of food, animal and vegetable, bird, beast, reptile, fish; the foot of an elephant, the hump of a buffalo, the edible bird-nests of China; snails, spiders, shell-fish, the strange and luscious creatures lately found in the extreme depths of the ocean and fished for with dynamite; in fact, every form of food pleasant to the palate of man was there. For, as you know, there are men who make fortunes now by preserving and breeding the game animals, like the deer, the moose, the elk, the buffalo, the antelope, the mountain sheep and goat, and many others, which but for their care would long since have become extinct. They select barren regions in mild climates, not fit for agriculture, and enclosing large tracts with wire fences, they raise great quantities of these valuable game animals, which they sell to the wealthy gourmands of the great cities, at very high prices.

I was perplexed, and, turning to the great man who stood near me, I began to name a few of the articles I wanted. He smiled complacently at my country ignorance, and called my attention to the fact that the table immediately before me contained hundreds of little knobs or buttons, each one numbered; and he told me that these were connected by electric wires with the kitchen of the hotel, and if I would observe the numbers attached to any articles in the bill of fare which I desired, and would touch the corresponding numbers of the knobs before me, my dinner would be ordered on a similar mirror in the kitchen, and speedily served. I did as he directed. In a little while an electric bell near me rang; the bill of fare disappeared from the mirror; there was a slight clicking sound; the table parted in front of me, the electric knobs moving aside; and up through the opening rose my dinner carefully arranged, as upon a table, which exactly filled the gap caused by the recession of that part of the original table which contained the electric buttons. I need not say I was astonished. I commenced to eat, and immediately the same bell, which had announced the disappearance of the bill of fare, rang again. I looked up, and the mirror now contained the name of every state in the Republic, from Hudson's Bay to the Isthmus of Darien; and the names of all the nations of the world; each name being numbered. My attendant, perceiving my perplexity, called my attention to the fact that the sides of the table which had brought up my dinner contained another set of electric buttons, corresponding with the numbers on the mirror; and he explained to me that if I would select any state or country and touch the corresponding button the news of the day, from that state or country, would appear in the mirror. He called my attention to, the fact that every guest in the room had in front of him a similar mirror, and many of them were reading the news of the day as they ate. I touched the knob corresponding with the name of the new state of Uganda, in Africa, and immediately there appeared in the mirror all the doings of the people of that state--its crimes, its accidents, its business, the output of its mines, the markets, the sayings and doings of its prominent men; in fact, the whole life of the community was unrolled before me like a panorama. I then touched the button for another African state, Nyanza; and at once I began to read of new lines of railroad; new steam-ship fleets upon the great lake; of large colonies of white men, settling new States, upon the higher lands of the interior; of their colleges, books, newspapers; and particularly of a dissertation upon the genius of Chaucer, written by a Zulu professor, which had created considerable interest among the learned societies of the Transvaal. I touched the button for China and read the important news that the Republican Congress of that great and highly civilized nation had decreed that English, the universal language of the rest of the globe, should be hereafter used in the courts of justice and taught in all the schools. Then came the news that a Manchurian professor, an iconoclast, had written a learned work, in English, to prove that George Washington's genius and moral greatness had been much over-rated by the partiality of his countrymen. He was answered by a learned doctor of Japan who argued that the greatness of all great men consisted simply in opportunity, and that for every illustrious name that shone in the pages of history, associated with important events, a hundred abler men had lived and died unknown. The battle was raging hotly, and all China and Japan were dividing into contending factions upon this great issue.

Our poor ignorant ancestors of a hundred years ago drank alcohol in various forms, in quantities which the system could not consume or assimilate, and it destroyed their organs and shortened their lives. Great agitations arose until the manufacture and sale of alcoholic beverages was prohibited over nearly all the world. At length the scientists observed that the craving was based on a natural want of the system; that alcohol was found in small quantities in nearly every article of food; and that the true course was to so increase the amount of alcohol in the food, without gratifying the palate, as to meet the real necessities of the system, and prevent a decrease of the vital powers.

It is laughable to read of those days when men were drugged with pills, boluses and powders. Now our physic is in our food; and the doctor prescribes a series of articles to be eaten or avoided, as the case may be. One can see at once by consulting his "vital-watch," which shows every change in the magnetic and electric forces of the body, just how his physical strength wanes or increases; and he can modify his diet accordingly; he can select, for instance, a dish highly charged with quinine or iron, and yet perfectly palatable; hence, among the wealthier classes, a man of one hundred is as common now-a-days as a man of seventy was a century ago; and many go far beyond that point, in full possession of all their faculties.

I glanced around the great dining-room and inspected my neighbors. They all carried the appearance of wealth; they were quiet, decorous and courteous. But I could not help noticing that the women, young and old, were much alike in some particulars, as if some general causes had molded them into the same form. Their brows were all fine--broad, square, and deep from the ear forward; and their jaws also were firmly developed, square like a soldier's; while the profiles were classic in their regularity, and marked by great firmness. The most peculiar feature was their eyes. They had none of that soft, gentle, benevolent look which so adorns the expression of my dear mother and other good women whom we know. On the contrary, their looks were bold, penetrating, immodest, if I may so express it, almost to fierceness: they challenged you; they invited you; they held intercourse with your soul.

The chief features in the expression of the men were incredulity, unbelief, cunning, observation, heartlessness. I did not see a good face in the whole room: powerful faces there were, I grant you; high noses, resolute mouths, fine brows; all the marks of shrewdness and energy; a forcible and capable race; but that was all. I did not see one, my dear brother of whom I could say, "That man would sacrifice himself for another; that man loves his fellow man."