It is man’s nature to soar intellectually, and it seems to have been his ambition from earliest ages to soar physically1.
Every one in health knows, or at some period of life must have known, that upward bounding of the spirit which induces a longing2 for the possession of wings, that the material body might be wafted4 upwards5 into those blue realms of light, which are so attractive to the eye and imagination of poor creeping man that he has appropriately styled them the heavens.
Man has envied the birds since the world began. Who has not watched, with something more than admiration6, the easy gyrations of the sea-mew, and listened, with something more than delight, to the song of the soaring lark7?
To fly with the body as well as with the mind, is a wish so universal that the benignant Creator Himself seems to recognise it in that most attractive passage in Holy Writ8, wherein it is said that believers shall “mount up with wings as eagles, they shall run and not be weary, they shall walk and not faint.”
Of course man has not reached the middle of the nineteenth century without making numerous attempts to fly bodily up to the skies. Fortunately, however, such ambitious efforts have seldom been made except by the intellectually enthusiastic. Prosaic10 man, except in the case of the Tower of Babel, has remained content to gaze upwards with longing desire, and only a few of our species in the course of centuries have possessed11 temerity12 enough to make the deliberate effort to ride upon the wings of the wind.
Naturally, the first attempts were, like most beginnings, simple and imitative. The birds flew with wings, therefore man put on artificial wings and essayed to fly like the birds. It was not until many grievous disappointments and sad accidents had befallen him, that he unwillingly13 gave up wings in despair, and set to work to accomplish his ends by more cumbrous and complex machinery14.
Very early in the world’s history, however, “flying machines” were made, some of which were doubtless intended by their honest inventors to carry men through the air, while others were mere15 shams16, made by designing men, wherewith to impose upon the ignorant for wicked ends of their own; and some of these last were, no doubt, believed to be capable of the feats17 attributed to them.
The credulity of the ancients is not to be wondered at when we reflect on the magical illusions which science enables us to produce at the present day—illusions so vivid and startling that it requires the most elaborate explanations by adepts19 and philosophers to convince some among their audiences that what they think they see is absolutely not real! No wonder that the men of old had firm faith in the existence of all kinds of flying machines and creatures.
They believed that fiery20 dragons were created by infernal machination, which, although not what we may call natural creatures, were nevertheless supposed to rush impetuous through the sky, vomiting21 flames and scattering22 the seeds of pestilence23 far and wide. In those dark ages, writers even ventured to describe the method of imitating the composition of such terrific monsters! A number of large hollow reeds were to be bound together, then sheathed24 completely in skin, and smeared25 over with pitch and other inflammable matters. This light and bulky engine, when set on fire, launched during thick darkness from some cliff into the air, and borne along by the force of the wind, would undoubtedly26 carry conviction to the minds of the populace, whilst it would fill them with amazement27 and terror!
Sometimes, however, those who attempted to practise on the credulity of their fellows were themselves appalled28 by the results of their contrivances. Such was the case so late as the year 1750, when a small Roman Catholic town in Swabia was almost entirely29 burnt to ashes by an unsuccessful experiment made by some of the lowest order of priests for the astonishment30, if not the edification, of their flocks. An attempt was made by them to represent the effigy31 of Martin Luther, whom the monks32 believed to be in league with Satan, under the form of a winged serpent with a forked tail and hideous34 claws. Unfortunately Martin’s effigy, when ignited, refused to fly, and, instead of doing what was required of it, fell against the chimney of a house to which it set fire. The flames spread furiously in every direction, and were not subdued35 until the town was nearly consumed.
In the early part of the sixteenth century a very determined36 attempt at flying was made by an Italian who visited Scotland, and was patronised by James the Fourth. He gained the favour of that monarch37 by holding out to him hopes of replenishing his treasury38 by means of the “philosopher’s stone.” The wily Italian managed, by his plausible39 address, to obtain a position which replenished40, to some degree, his own empty purse, having been collated41 by royal favour to the abbacy of Tungland, in Galloway. Being an ingenious fellow, and somewhat, apparently42, of an enthusiast9, he spent some of his leisure time in fashioning a pair of huge wings of various plumage, with which he actually undertook to fly through the air from the walls of Stirling Castle to France! That he believed himself to be capable of doing so seems probable, from the fact that he actually made the attempt, but fell to the ground with such violence as to break his leg. He was sharp-witted, however, for instead of retiring crest-fallen at his failure, he coolly accounted for the accident by saying, “My wings were composed of various feathers; among them were the feathers of dunghill fowls43, and they, by a certain sympathy, were attracted to the dunghill; whereas, had my wings been composed of eagles’ feathers alone, the same sympathy would have attracted them to the region of the air!”
About a century later a poor monk33, whose boldness and enterprise were more conspicuous44 than his prudence45, attempted a similar feat18. He provided himself with a gigantic pair of wings, constructed on a principle propounded46 by the rector of the grammar school of Tubingen, in 1617, and, leaping from the top of a high tower, fell to the ground, broke both his legs, and lost his life.
It was long before men came to see and admit that in regard to this they were attempting to accomplish the impossible.
There can be no doubt that it is absolutely impossible for man to fly by the simple power of his own muscles, applied47 to any sort of machinery whatever. This is not an open question. That man may yet contrive48 to raise himself in the air by means of steam or electricity, or some other motive49 power, remains50 to be seen. It does not seem probable, but no one can say authoritatively51 that it is impossible. It is demonstrable, however, that to rise, or even to remain suspended, in the air by means of machinery impelled53 by human force alone is a feat which is as much an impossibility as it is for a man, by the strength of his own legs, to leap thirty or forty times his own length,—a grasshopper54 can do that easily, and a bird can fly easily, but a man cannot, and never will be able to do so, because his peculiar55 conformation forbids it.
This was first demonstrated by Borelli, an eminent56 Italian mathematician57 and philosopher, who lived in a fertile age of discovery, and was thoroughly58 acquainted with the true principles of mechanics and pneumatics. He showed, by accurate calculation, the prodigious60 force which in birds must be exerted and maintained by the pectoral muscles with which the all-wise Creator has supplied them, and, by applying the same principles to the structure of the human frame, he proved how extremely disproportionate was the strength of the corresponding muscles in man. In fact, the man who should attempt to fly like a bird would be guilty of greater folly61 and ignorant presumption62 than the little infant who should endeavour to perform the feats of a gladiator! It is well for man in all things to attain63, if possible, to a knowledge of what certainly lies beyond his powers, for such knowledge prevents the waste and misdirection of energies, as well as saving from disappointment and other evil results.
But many of those enthusiasts64, who have attempted at various periods of the world’s history to fly, did not fall into the error which we have attempted to point out. On the contrary, they went intelligently to work; their only aim being modestly to fly somewhat after the manner of a bird, but they all failed; nevertheless one philosopher, of modern times, stoutly65 continued to assert the opinion that there is no impossibility in man being able to fly apparently, though not really, like a bird. He did not hold that man could ever fly as high, or as far, or as fast, or in any degree as easily, as a bird. All that he ventured to say was, that he might perhaps fly somewhat like one.
As the plan of this philosopher is rather curious, we shall detail it.
It is well known that balloons, filled with appropriate gas, will rise. Big balloons and little ones are equally uppish in their tendencies. It is also known that rotundity of form is not essential to the successful rising of a balloon. “Well, then,” says this philosopher, “what is to prevent a man making two balloons, flattish, and in the form of wings, which, instead of flying away with him, as ordinary balloons would infallibly do, should be so proportioned to his size and weight as that they would not do more than raise him an inch or so off the ground, and so keep him stotting and bobbing lightly about, something like the bright thin india-rubber balls with which children are wont66 to play now-a-days?
“Having attained67 this position of, so to speak, readiness to fly, there is nothing to prevent him from propelling himself gently along the surface of the ground by means of fans, or, if you choose, small flexible cloth wings attached to the hands and arms. The legs might also be brought into play a little. It is obvious, however, that such wings would require to be mounted only in calm weather, for a breeze of wind would infallibly sweep the flyer off the face of the earth! We would only observe, in conclusion, that, however ridiculous this method of flying may appear in your eyes, this at least may be said in its favour, that whereas all other plans that have been tried have signally failed, this plan has never failed—never having been tried! We throw the idea before a discriminating68 public, in the hope that some aspiring69 enthusiast, with plenty of means and nerve, and no family to mourn his loss, may one day prove, to the confusion of the incredulous, that our plan is not a mere flight of imagination!”
When men began to find that wings refused in any circumstances to waft3 them to the realms of ether, they set about inventing aerial machines in which to ascend70 through the clouds and navigate71 the skies.
In the fourteenth century a glimmering72 of the true principles on which a balloon could be constructed was entertained by Albert of Saxony, a monk of the order of Saint Augustin, but he never carried his theories into practice. His opinion was that, since fire is more attenuated73 than air, and floats above the region of our atmosphere, all that was necessary would be to enclose a portion of such ethereal substance in a light hollow globe which would thus be raised to a certain height, and kept suspended in the sky, and that by introducing a portion of air into the globe it would be rendered heavier than before, and might thus be made to descend74. This was in fact the statement of the principles on which fire-balloons were afterwards constructed and successfully sent up, excepting that air heated by fire, instead of fire itself, was used.
Others who came after Albert of Saxony held the same theory, but they all failed to reduce it to practice, and most of these men coupled with their correct notions on the subject, the very erroneous idea that by means of masts, sails, and a rudder, a balloon might be made to sail through the air as a ship sails upon the sea. In this they seem to have confounded two things which are dissimilar, namely, a vessel75 driven through water, and a vessel floating in air.
The fallacy here may be easily pointed76 out. A ship is driven through water by a body in motion, namely, wind, while its rudder is dragged through a body comparatively at rest, namely, water; hence the rudder slides against or is pushed against the water, and according as it is turned to one side or the other, it is pushed to one side or the other, the stern of the ship going along with it, and the bow, of course, making a corresponding motion in the opposite direction. Thus the ship is turned or “steered77,” but it is manifest that if the ship were at rest there would be no pushing of the rudder by the water—no steering78. On the other hand, if, though the ship were in motion, the sea was also flowing at the same rate with the wind, there would be no flowing of water past the ship, the rudder would not be acted on, and the vessel could not be steered.
Now a balloon, carried by the wind, cannot be steered by a rudder, because it does not, like the ship, rest half in one medium which is in motion, and half in another medium which is at rest. There is no sliding of any substance past its side, no possibility therefore of pushing a rudder against anything. All floats along with the wind.
If, however, the balloon could be made to go faster than the wind, then steering would at once become possible; but sails cannot accomplish this, because, although wind can drive a ship faster than water flows, wind cannot drive a substance faster than itself flows.
The men of old did not, however, seem to take these points into consideration. It yet remains to be seen whether steam shall ever be successfully applied to aerial machines, but this may certainly be assumed in the meantime, that, until by some means a balloon is propelled faster than the wind through the atmosphere, sails will be useless, and steering, or giving direction, impossible.
It was believed, in those early times, when scientific knowledge was slender, that the dew which falls during the night is of celestial79 origin, shed by the stars, and drawn80 by the sun, in the heat of the day, back to its native skies. Many people even went the length of asserting that an egg, filled with the morning dew, would, as the day advanced, rise spontaneously into the air. Indeed one man, named Father Laurus, speaks of this as an observed fact, and gravely gives directions how it is to be accomplished81. “Take,” says he, “a goose’s egg, and having filled it with dew gathered fresh in the morning, expose it to the sun during the hottest part of the day, and it will ascend and rest suspended for a few moments.” Father Laurus must surely have omitted to add that a goose’s brains in the head of the operator was an element essential to the success of the experiment!
But this man, although very ignorant in regard to the nature of the substances with which he wrought82, had some quaint59 notions in his head. He thought, for instance, that if he were to cram83 the cavity of an artificial dove with highly condensed air, the imprisoned84 fluid would impel52 the machine in the same manner as wind impels85 a sail. If this should not be found to act effectively, he proposed to apply fire to it in some way or other, and, to prevent the machine from being spirited away altogether by that volatile86 element, asbestos, or some incombustible material, was to be used as a lining87. To feed and support this fire steadily88, he suggested a compound of butter, salts, and orpiment, lodged89 in metallic90 tubes, which, he imagined, would at the same time heighten the whole effect by emitting a variety of musical tones like an organ!
Another man, still more sanguine91 than the lest in his aerial flights of fancy, proposed that an ascent92 should be attempted by the application of fire as in a rocket to an aerial machine. We are not, however, told that this daring spirit ever ventured to try thus to invade the sky.
There can be no doubt that much ingenuity93, as well as absurdity94, has been displayed in the various suggestions that have been made from time to time, and occasionally carried into practice. One man went the length of describing a huge apparatus95, consisting of very long tin pipes, in which air was to be compressed by the vehement96 action of fire below. In a boat suspended from the machine a man was to sit and direct the whole by the opening and shutting of valves.
Another scheme, more ingenious but not less fallacious, was propounded in 1670 by Francis Lana, a Jesuit, for navigating97 the air. This plan was to make four copper98 balls of very large dimensions, yet so extremely thin that, after the air had been extracted, they should become, in a considerable degree, specifically lighter99 than the surrounding medium. Each of his copper balls was to be about 25 feet in diameter, with the thickness of only the 225th part of an inch, the metal weighing 365 pounds avoirdupois, while the weight of the air which it should contain would be about 670 pounds, leaving, after a vacuum had been formed, an excess of 305 pounds for the power of ascension. The four balls would therefore, it was thought, rise into the air with a combined force of 1220 pounds, which was deemed by Lana to be sufficient to transport a boat completely furnished with masts, sails, oars100, and rudders, and carrying several passengers. The method by which the vacuum was to be obtained was by connecting each globe, fitted with a stop-cock, to a tube of at least thirty-five feet long; the whole being filled with water; when raised to the vertical101 position the water would run out, the stop-cocks would be closed at the proper time, and the vacuum secured. It does not seem to have entered the head of this philosopher that the weight of the surrounding atmosphere would crush and destroy his thin exhausted102 receivers, but he seems to have been alarmed at the idea of his supposed discovery being applied to improper103 uses, such as the passing of desperadoes over fortified104 cities, on which they might rain down fire and destruction from the clouds!
Perhaps the grandest of all the fanciful ideas that have been promulgated105 on this subject was that of Galien, a Dominican friar, who proposed to collect the fine diffused106 air of the higher regions, where hail is formed, above the summit of the loftiest mountains, and to enclose it in a cubical bag of enormous dimensions—extending more than a mile every way! This vast machine was to be composed of the thickest and strongest sail-cloth, and was expected to be capable of transporting through the air a whole army with all their munitions107 of war!
There were many other devices which men hit upon, some of which embraced a certain modicum108 of truth mixed with a large proportion of fallacy. Ignorance, more or less complete, as to the principles and powers with which they dealt, was, in days gone by, the cause of many of the errors and absurdities109 into which men were led in their efforts to mount the atmosphere. Our space, however, forbids further consideration of this subject, which is undoubtedly one of considerable interest, and encircled with a good deal of romance.
Turning away from all those early and fanciful speculations110, we now come to that period in the history of balloon voyaging, or aeronautics111, when true theories began to be philosophically112 applied, and ascending113 into the skies became an accomplished fact.
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1
physically
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| adj.物质上，体格上，身体上，按自然规律 | |
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longing
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| n.（for）渴望 | |
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waft
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| v.飘浮，飘荡；n.一股；一阵微风；飘荡 | |
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wafted
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| v.吹送，飘送，（使）浮动( waft的过去式和过去分词 ) | |
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upwards
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| adv.向上，在更高处...以上 | |
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admiration
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| n.钦佩，赞美，羡慕 | |
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lark
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| n.云雀，百灵鸟；n.嬉戏，玩笑；vi.嬉戏 | |
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writ
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| n.命令状，书面命令 | |
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enthusiast
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| n.热心人，热衷者 | |
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prosaic
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| adj.单调的，无趣的 | |
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possessed
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| adj.疯狂的；拥有的，占有的 | |
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temerity
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| n.鲁莽，冒失 | |
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unwillingly
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| adv.不情愿地 | |
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machinery
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| n.(总称)机械，机器；机构 | |
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mere
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| adj.纯粹的；仅仅，只不过 | |
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shams
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| 假象( sham的名词复数 )； 假货； 虚假的行为（或感情、言语等）； 假装…的人 | |
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feats
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| 功绩，伟业，技艺( feat的名词复数 ) | |
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feat
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| n.功绩；武艺，技艺；adj.灵巧的，漂亮的，合适的 | |
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adepts
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| n.专家，能手( adept的名词复数 ) | |
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fiery
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| adj.燃烧着的，火红的；暴躁的；激烈的 | |
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vomiting
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| 吐 | |
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scattering
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| n.[物]散射；散乱，分散；在媒介质中的散播adj.散乱的；分散在不同范围的；广泛扩散的；（选票）数量分散的v.散射(scatter的ing形式)；散布；驱散 | |
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pestilence
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| n.瘟疫 | |
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sheathed
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| adj.雕塑像下半身包在鞘中的；覆盖的；铠装的；装鞘了的v.将（刀、剑等）插入鞘( sheathe的过去式和过去分词 )；包，覆盖 | |
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smeared
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| 弄脏； 玷污； 涂抹； 擦上 | |
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undoubtedly
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| adv.确实地，无疑地 | |
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amazement
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| n.惊奇，惊讶 | |
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appalled
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| v.使惊骇，使充满恐惧( appall的过去式和过去分词)adj.惊骇的；丧胆的 | |
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entirely
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| ad.全部地，完整地；完全地，彻底地 | |
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astonishment
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| n.惊奇，惊异 | |
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effigy
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| n.肖像 | |
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monks
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| n.修道士，僧侣( monk的名词复数 ) | |
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monk
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| n.和尚，僧侣，修道士 | |
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hideous
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| adj.丑陋的，可憎的，可怕的，恐怖的 | |
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subdued
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| adj. 屈服的，柔和的，减弱的 动词subdue的过去式和过去分词 | |
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determined
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| adj.坚定的；有决心的 | |
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monarch
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| n.帝王，君主，最高统治者 | |
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treasury
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| n.宝库；国库，金库；文库 | |
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plausible
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| adj.似真实的，似乎有理的，似乎可信的 | |
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replenished
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| 补充( replenish的过去式和过去分词 )； 重新装满 | |
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collated
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| v.校对( collate的过去式和过去分词 )；整理；核对；整理（文件或书等） | |
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apparently
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| adv.显然地；表面上，似乎 | |
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fowls
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| 鸟( fowl的名词复数 )； 禽肉； 既不是这； 非驴非马 | |
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conspicuous
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| adj.明眼的，惹人注目的；炫耀的，摆阔气的 | |
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prudence
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| n.谨慎，精明，节俭 | |
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propounded
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| v.提出（问题、计划等）供考虑[讨论]，提议( propound的过去式和过去分词 ) | |
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applied
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| adj.应用的；v.应用，适用 | |
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contrive
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| vt.谋划，策划；设法做到；设计，想出 | |
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motive
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| n.动机，目的；adv.发动的，运动的 | |
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remains
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| n.剩余物，残留物；遗体，遗迹 | |
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authoritatively
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| 命令式地，有权威地，可信地 | |
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impel
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| v.推动；激励，迫使 | |
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impelled
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| v.推动、推进或敦促某人做某事( impel的过去式和过去分词 ) | |
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grasshopper
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| n.蚱蜢，蝗虫，蚂蚱 | |
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peculiar
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| adj.古怪的，异常的；特殊的，特有的 | |
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eminent
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| adj.显赫的，杰出的，有名的，优良的 | |
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mathematician
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| n.数学家 | |
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thoroughly
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| adv.完全地，彻底地，十足地 | |
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quaint
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| adj.古雅的，离奇有趣的，奇怪的 | |
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prodigious
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| adj.惊人的，奇妙的；异常的；巨大的；庞大的 | |
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folly
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| n.愚笨，愚蠢，蠢事，蠢行，傻话 | |
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presumption
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| n.推测，可能性，冒昧，放肆，[法律]推定 | |
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63
attain
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| vt.达到，获得，完成 | |
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64
enthusiasts
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| n.热心人，热衷者( enthusiast的名词复数 ) | |
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65
stoutly
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| adv.牢固地，粗壮的 | |
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66
wont
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| adj.习惯于；v.习惯；n.习惯 | |
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attained
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| （通常经过努力）实现( attain的过去式和过去分词 )； 达到； 获得； 达到（某年龄、水平、状况） | |
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68
discriminating
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| a.有辨别能力的 | |
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69
aspiring
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| adj.有志气的；有抱负的；高耸的v.渴望；追求 | |
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70
ascend
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| vi.渐渐上升，升高；vt.攀登，登上 | |
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71
navigate
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| v.航行，飞行；导航，领航 | |
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72
glimmering
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| n.微光，隐约的一瞥adj.薄弱地发光的v.发闪光，发微光( glimmer的现在分词 ) | |
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73
attenuated
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| v.（使）变细( attenuate的过去式和过去分词 )；（使）变薄；（使）变小；减弱 | |
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74
descend
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| vt./vi.传下来，下来，下降 | |
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75
vessel
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| n.船舶；容器，器皿；管，导管，血管 | |
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pointed
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| adj.尖的，直截了当的 | |
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steered
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| v.驾驶( steer的过去式和过去分词 )；操纵；控制；引导 | |
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steering
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| n.操舵装置 | |
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79
celestial
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| adj.天体的；天上的 | |
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80
drawn
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| v.拖，拉，拔出；adj.憔悴的，紧张的 | |
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accomplished
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| adj.有才艺的；有造诣的；达到了的 | |
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wrought
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| v.引起；以…原料制作；运转；adj.制造的 | |
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cram
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| v.填塞，塞满，临时抱佛脚，为考试而学习 | |
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imprisoned
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| 下狱，监禁( imprison的过去式和过去分词 ) | |
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impels
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| v.推动、推进或敦促某人做某事( impel的第三人称单数 ) | |
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volatile
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| adj.反复无常的，挥发性的，稍纵即逝的，脾气火爆的；n.挥发性物质 | |
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lining
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| n.衬里，衬料 | |
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steadily
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| adv.稳定地；不变地；持续地 | |
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lodged
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| v.存放( lodge的过去式和过去分词 )；暂住；埋入；（权利、权威等）归属 | |
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metallic
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| adj.金属的；金属制的；含金属的；产金属的；像金属的 | |
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sanguine
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| adj.充满希望的，乐观的，血红色的 | |
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ascent
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| n.(声望或地位)提高；上升，升高；登高 | |
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ingenuity
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| n.别出心裁；善于发明创造 | |
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absurdity
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| n.荒谬，愚蠢；谬论 | |
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apparatus
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| n.装置，器械；器具，设备 | |
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vehement
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| adj.感情强烈的；热烈的；(人)有强烈感情的 | |
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navigating
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| v.给（船舶、飞机等）引航，导航( navigate的现在分词 )；（从海上、空中等）横越；横渡；飞跃 | |
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98
copper
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| n.铜；铜币；铜器；adj.铜(制)的；(紫)铜色的 | |
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99
lighter
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| n.打火机，点火器；驳船；v.用驳船运送；light的比较级 | |
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100
oars
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| n.桨，橹( oar的名词复数 )；划手v.划（行）( oar的第三人称单数 ) | |
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101
vertical
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| adj.垂直的，顶点的，纵向的；n.垂直物，垂直的位置 | |
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102
exhausted
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| adj.极其疲惫的，精疲力尽的 | |
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103
improper
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| adj.不适当的，不合适的，不正确的，不合礼仪的 | |
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104
fortified
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| adj. 加强的 | |
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105
promulgated
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| v.宣扬（某事物）( promulgate的过去式和过去分词 )；传播；公布；颁布（法令、新法律等） | |
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106
diffused
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| 散布的，普及的，扩散的 | |
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107
munitions
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| n.军火，弹药；v.供应…军需品 | |
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108
modicum
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| n.少量，一小份 | |
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109
absurdities
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| n.极端无理性( absurdity的名词复数 )；荒谬；谬论；荒谬的行为 | |
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110
speculations
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| n.投机买卖( speculation的名词复数 )；思考；投机活动；推断 | |
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111
aeronautics
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| n.航空术，航空学 | |
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112
philosophically
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| adv.哲学上；富有哲理性地；贤明地；冷静地 | |
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113
ascending
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| adj.上升的，向上的 | |
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