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Parabolical   Listen
adjective
Parabolical, Parabolic  adj.  
1.
Of the nature of a parable; expressed by a parable or figure; allegorical; as, parabolical instruction.
2.
(Geom.)
(a)
Having the form or nature of a parabola; pertaining to, or resembling, a parabola; as, a parabolic curve.
(b)
Having a form like that generated by the revolution of a parabola, or by a line that moves on a parabola as a directing curve; as, a parabolic conoid; a parabolic reflector; a parabolic antenna.
Parabolic conoid, a paraboloid; a conoid whose directing curve is a parabola. See Conoid.
Parabolic mirror (Opt.), a mirror having a paraboloidal surface which gives for parallel rays (as those from very distant objects) images free from aberration. It is used in reflecting telescopes.
Parabolic spindle, the solid generated by revolving the portion of a parabola cut off by a line drawn at right angles to the axis of the curve, about that line as an axis.
Parabolic spiral, a spiral curve conceived to be formed by the periphery of a semiparabola when its axis is wrapped about a circle; also, any other spiral curve having an analogy to the parabola.






Collaborative International Dictionary of English 0.48








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"Parabolical" Quotes from Famous Books



... tool that a vinedresser needs is a knife. The chief secret of culture is merciless pruning. And so says my text, 'The Father is the Husbandman.' Our Lord assumes that office in other of His parables. But here the exigencies of the parabolic form require that the office of Cultivator should be assigned only to the Father; although we are not to forget that the Father, in that office, works through and in ...
— Expositions of Holy Scripture: St. John Chaps. XV to XXI • Alexander Maclaren

... nation merry in his 'Rehearsal Transprosed.' This Parker had a 'knack' at making himself odious; he had a curiosa felicitas in attracting hatreds, and wherever he lodged for a fortnight he trailed after him a vast parabolic or hyperbolic tail of enmity and curses, all smoke and fire and tarnish, which bore the same ratio to his small body of merit that a comet's tail, measuring billions of miles, does to the little cometary mass. The ...
— The Posthumous Works of Thomas De Quincey, Vol. 1 (2 vols) • Thomas De Quincey

... and do not keep within the general plane of the planetary system, but traverse it sometimes from above and sometimes from below. Other comets, including most of the "great'' ones, appear to travel in parabolic or, in a few cases, hyperbolic orbits, which, not being closed curves, never bring them back again. But it is not certain that these orbits may not be extremely eccentric ellipses, and that after the lapse of hundreds, or thousands, of years the ...
— Curiosities of the Sky • Garrett Serviss

... of it, and ([Greek: katerephes]) laurel, all plain fact, from Arona, on the Lago Maggiore; and, I believe, the reader, though we have not as yet said anything about lines, will at once, on comparing it with Fig. 87, recognize the difference between the true parabolic flow of the rock-lines and the humpbacked deformity of Claude; and, still more, the difference between the delicate overhanging of the natural cliff, cautiously diminished as it gets higher[87], and the ideal danger ...
— Modern Painters, Volume IV (of V) • John Ruskin

... Barbican; "at a certain velocity it would take a parabolic curve; with a velocity considerably greater it should ...
— All Around the Moon • Jules Verne

... where the top remains perfect at Gizeh, the side ends in a parabolic curve which turns over into the top surface without any cornice or moulding; the tops of walls in the courts of mastabas ...
— Manual Of Egyptian Archaeology And Guide To The Study Of Antiquities In Egypt • Gaston Camille Charles Maspero

... must be as nearly perfect as possible; this requires that every ray of light that forms the image shall be brought to a point in the image precisely corresponding to that from which it emanates in the real object. In reflectors this is effected by giving a parabolic form to the concave surface of the mirror. In refractors there is a twofold difficulty to be overcome. In the first place, a lens with spherical surfaces does not bend all the rays that pass through ...
— Pleasures of the telescope • Garrett Serviss

... indignant warrior apologies for my friend's parabolic method of descent, and suggested ...
— Simon the Jester • William J. Locke

... Jesus. This in no respect reduces the truthfulness of the narratives. Temptation never becomes temptation till it passes to that inner scene of action and debate. Since Jesus shows in all his teaching a natural use of parabolic language to set forth spiritual truth, the inference is almost inevitable that the gospels have in like manner adopted the language of vivid picture as alone adequate to depict the essential reality of his inner struggle. In any case the narrative could have come from no other ...
— The Life of Jesus of Nazareth • Rush Rhees

... my astonishment that now the Russian missiles had become dull, while on the other hand, the shrill shell was invariably heralded by a flash from one of our guns, now far in the rear. What had happened was this: Every shell describes in its course a parabolic line, with the first half of the curve ascending and the second one descending. Apparently in the first half of its curve, that is, its course while ascending, the shell produced a dull whine accompanied by a falling cadence, which changes ...
— Four Weeks in the Trenches - The War Story of a Violinist • Fritz Kreisler

... satisfactory, for though inclined to rebellion and positivism he was still the pupil of that mythical philosophy which attributed the value of things to their origin rather than to their uses, because it had first, in its parabolic way, erected the highest good into a First Cause. Still breathing, in spite of himself, this atmosphere of materialised Platonism, Hume could not discover the true origin of anything without imagining that he had ...
— The Life of Reason • George Santayana

... rapidly, feeding out triangulated data on the positions of the escape vehicle and the capsule. The capsule had been diverted from its path slightly by reaction to the vehicle's ejection. Its speed, however, was increasing as it moved farther out. The vehicle with Lynds was in a path parabolic to the capsule, almost like the start of an orbit, but at a fantastic distance. He was, of course, traveling at escape velocity or better, and you do not ...
— What Need of Man? • Harold Calin

... possessions that can never leave him;—rational and spiritual possessions which, in relation to our internal life, correspond to worldly possessions in relation to our external life, and were therefore signified in the parabolic language ...
— The Elements of Character • Mary G. Chandler

... operations of rescue; on lifeboats and on lifebuoys. In regard to icebergs, he thought the possibility of obtaining an echo from an iceberg when in dangerous proximity to a ship should be tried. He advocated the use of automatic sprinklers in the case of fire, the establishment of parabolic reflectors for concentration of sound, and the further prosecution of experiments by Professor Bell in establishing communication between vessels some distance apart by means of interrupted electrical currents. The improvement of navigation, he said, meant ...
— Scientific American Supplement, No. 514, November 7, 1885 • Various

... apparatus we saw I cannot explain, because we neither of us learnt what it was for or how it worked. One after another, big shafts of metal flung out and up from its centre, their heads travelling in what seemed to me to be a parabolic path; each dropped a sort of dangling arm as it rose towards the apex of its flight and plunged down into a vertical cylinder, forcing this down before it. About it moved the shapes of tenders, little figures that seemed vaguely different from the beings about us. As each of the three dangling ...
— The First Men In The Moon • H. G. Wells

... the question coming in a sort of parabolic curve and he dodged it. By a neat evasion he got the topic switched to sociology, from that to philosophy, to heredity, literature, journalism, art, and finally prenatalism. Every effort I made to probe him on public finance was ...
— The Masques of Ottawa • Domino

... well as the numerous prejudices that darken our understandings in the present state, some obscurities will always attend even the clearest revelations of Heaven. "Touched with a feeling of our infirmities," our blessed Saviour often adopted a parabolic method of instruction, which was calculated to awaken attention and to stimulate inquiry, as well as to simplify the great principles he was perpetually inculcating; and he has caused those frequent conversations into which he entered with different individuals ...
— Female Scripture Biographies, Vol. II • Francis Augustus Cox

... from 6 to 5 1/2 feet gave two results—first, less carrying capacity; and, second, less head-on resistance, owing to the fact that the extent of the parabolic curve in the carrying surfaces was shortened. The "head-on" resistance is the retardance the aeroplane meets in passing through the air, and is counted in square feet. In the 1908 model the curve being one in twelve and 6 feet deep, gave 6 inches of ...
— Flying Machines - Construction and Operation • W.J. Jackman and Thos. H. Russell

... while we treat the parable as a distinct species of analogical instruction, we must treat the parables spoken by the Lord as a unique and separate class. As the Lord's people in ancient times dwelt alone, and were not reckoned among the nations, the Lord's parabolic teaching stands apart by itself, and cannot with propriety be associated with other specimens of metaphorical teaching. Logically as well as spiritually it is true, that "never man spake ...
— The Parables of Our Lord • William Arnot

... try to guess it, for you never will. I turn the flange inward on a Wilkinson lathe and give it a parabolic section so that the axes are always parallel to each other ...
— First and Last • H. Belloc

... overreached artifice, Janet, and gone back to Bible days and corrupted them by borrowing parabolic speech to waste upon deaf-eared ...
— Mistress Penwick • Dutton Payne

... grew almost unbearable as the ball soared in its parabolic flight and the red-haired runner streaked dark across the green. The ball seemed never to be coming down. And when it began to descend and reached a point perhaps fifty feet above the ground there appeared more distance ...
— The Redheaded Outfield and Other Baseball Stories • Zane Grey

... wished particularly to inspect. You remember that I called your attention to a shining object underneath the circular opening in the roof. You could not make out what it was, but I saw enough to convince me that it was a gigantic parabolic mirror. I'll show you a smaller one of ...
— The Moon Metal • Garrett P. Serviss

... and downrightness about it which is agreeable; nor do I know anywhere a more forcible statement of the doctrine, often held by no bad people, that beauty is a personal testimonial of the Divinity—a scarcely parabolic command to ...
— A History of the French Novel, Vol. 1 - From the Beginning to 1800 • George Saintsbury

... called, is slightly different from others used for the same purpose. The sounds set up by the headphone are conveyed to the apex of an inverted copper cone which is 7 inches long and 10 inches in diameter. Here it is reflected by a parabolic mirror which greatly amplifies the sounds. The amplification takes place without distortion, the sounds remaining as clear and crisp as when projected by the transmitting station. By removing the cap from the receiver the shell is screwed into a receptacle on the end of the loud speaker and ...
— The Radio Amateur's Hand Book • A. Frederick Collins

... silly Globule and look an unpremeditated Swipe. The Stroke rang sweet and vibrant. The ball rose in parabolic Splendor above the highest branches of ...
— Ade's Fables • George Ade

... center for a 125-ft. span parabolic arch with the amount and character of the stresses indicated and with a diagram of the actual deflections as measured ...
— Concrete Construction - Methods and Costs • Halbert P. Gillette

... even if a shell hit on the front of the canal bank, and one were on the back of the bank, five, eight, or ten seconds later one would hear a belated WHIRR, and curved pieces of shell would light—probably parabolic curves or boomerangs. These shells have a great back kick; from the field gun shrapnel we got nothing BEHIND the shell—all the pieces go forward. From the howitzers, the danger is almost as great behind as in front if they burst on percussion. Then ...
— In Flanders Fields and Other Poems - With an Essay in Character, by Sir Andrew Macphail • John McCrae

... blemish and blister the walls of our cathedrals and churches were the consequences. Verrio and Laguerre had long set the fashion of disfiguring ceilings and staircases with their incomprehensible compositions. Roubiliac carved similar parabolic productions in marble and set them up in Westminster Abbey and elsewhere. In these, heathen divinities jostle Christian emblems; Paganism is seen abreast of true religion. In the aisle of a Gothic abbey, John, Duke of Argyle and Greenwich, warrior and orator, ...
— Art in England - Notes and Studies • Dutton Cook

... a spectacle to behold, how, with a tumbler in each hand, he tossed the contents from one to the other. Never conveying it awry, nor spilling the least drop, he compelled the frothy liquor, as it seemed to me, to spout forth from one glass and descend into the other, in a great parabolic curve, as well-defined and calculable as a planet's orbit. He had a good forehead, with a particularly large development just above the eyebrows; fine intellectual gifts, no doubt, which he had educated to this profitable end; being ...
— The Blithedale Romance • Nathaniel Hawthorne

... MICAIAH AND AHAB.—The parabolic representation of Micaiah is held as proving not the bare permission of an event, but the actual deception of Ahab. The matter is recorded in 1 Kings xxii. Jehoshaphat had paid a visit to his neighbour, ...
— The Doctrines of Predestination, Reprobation, and Election • Robert Wallace

... his wretched company a dozen times a day, He used to quit his charger in a parabolic way, His method of saluting was the joy of all beholders, But Ahasuerus Jenkins had a head ...
— Departmental Ditties and Barrack Room Ballads • Rudyard Kipling

... night the nucleus of the comet had grown dull and began to disperse, and Jupiter's moon was close to it. The fourth night the comet had been divided into two parts; there were two heads and two tails, and both the starry phantoms began in separate parabolic curves their aimless flight through space. So "this" occurs in the heavens as well as ...
— Timar's Two Worlds • Mr Jkai

... of your correspondents can inform me where I can find a paper, called "Directions for making the best Composition for the Metals of reflecting Telescopes, and the Method of grinding, polishing, and giving the great Speculum the true parabolic figure," by ...
— Notes & Queries 1850.01.12 • Various

... alarmed. Walter had not burst under the strain; but the pressure of the crowd had broken in the double doors of a cafe! The irruption was terrible. The way the crowd streamed in might be compared to the flow of molten lava. Walter described a parabolic curve and landed on a table, without suffering ...
— Walter Pieterse - A Story of Holland • Multatuli

... very elongated orbit, either elliptic, turning round the Sun, or parabolic, dashing out into space. In the first case, they are periodic (Fig. 52), and their return can be calculated. In the second they surprise us unannounced, and return to the abysses of ...
— Astronomy for Amateurs • Camille Flammarion

... distinctly to the symbolic, the parabolic, allegoric, dreamy and mystical—to treatment of the world as an array of weird or half-fanciful existences, witnessing only to certain dim spiritual facts or abstract moralities, occasionally inverted moralities—"tail foremost moralities" as later he himself named them—that a ...
— Robert Louis Stevenson - a Record, an Estimate, and a Memorial • Alexander H. Japp

... slay men so swiftly and so silently. Many think that in some way they are able to generate an intense heat in a chamber of practically absolute non-conductivity. This intense heat they project in a parallel beam against any object they choose, by means of a polished parabolic mirror of unknown composition, much as the parabolic mirror of a lighthouse projects a beam of light. But no one has absolutely proved these details. However it is done, it is certain that a beam of heat is the essence of the matter. Heat, and invisible, instead of visible, light. Whatever ...
— The War of the Worlds • H. G. Wells

... When abreast of it they were less than two miles distant, and they secured several instantaneous impressions, which they put aside to develop later. As the radius of Phobos's circle was far shorter than that of the parabolic curve they were making, it began to draw away, and was rapidly left behind. Applying the full apergetic force to Mars and the larger moon, they shot away like an arrow, having had their speed increased by the planet's attraction while ...
— A Journey in Other Worlds - A Romance of the Future • John Jacob Astor

... of Jesus is to the effect that at the beginning of his reign the nations and peoples shall be gathered before him in the sense that they will be instructed concerning his reign. In parabolic phrase he pictures them being separated as sheep are separated from goats. A goat is an animal that is unruly, disobedient. It refuses to stay in the pasture where it is placed, but insists on getting outside and destroying things where it has no business. The goat, ...
— The Harp of God • J. F. Rutherford

... distances from the sun than the planets do. It must not be imagined, however, that all comets revolve about the sun even in the most lengthened ellipses. Three at least—the comets of 1723, 1771, and 1818—are known to have moved along hyperbolic paths instead of parabolic or elliptical ones. These comets, therefore, can make but one appearance in our skies. Having once shewn themselves there, and vanished, they are lost to us for ever. They are but stray and chance visitors ...
— Chambers's Edinburgh Journal, No. 450 - Volume 18, New Series, August 14, 1852 • Various

... U.S.A., for approximating to a high angle trajectory in a single arc, which assumes that the mean density of the air may be taken as the density at two-thirds of the estimated height of the vertex; the rule is founded on the fact that in an unresisted parabolic trajectory the average height of the shot is two-thirds the height of the vertex, as illustrated in a jet of water, or in a stream of bullets ...
— Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 2 - "Baconthorpe" to "Bankruptcy" • Various

... 'Whirl'd in an arch,' is a splendid instance of sound answering to sense, which the older critics made so much of; the additional syllable which breaks the measure, and necessitates an increased rapidity of utterance, seeming to express to the ear the rush of the sword up its parabolic curve. And with what lavish richness of presentative power is the boreal aurora, the collision, the crash, and the thunder of the meeting icebergs, brought before the eye. An inferior artist would have ...
— Selections from Wordsworth and Tennyson • William Wordsworth and Alfred Lord Tennyson

... through them, and saw how few of them were bringing 'an honest and good heart' for the soil of His word. Just because He saw the shallowness of the momentary enthusiasm, He spoke this pregnant parable from a heavy heart, and as He tells us in His explanation of it to the disciples (ver. 10), uses the parabolic garb as a means of hiding the truth from the unsusceptible, and of bringing it home to those who were prepared to receive it. Every parable has that double purpose of obscuring and revealing. The obscuring is punitive, but the punishment is meant to be remedial. God never cheats men by ...
— Expositions Of Holy Scripture - Volume I: St. Luke, Chaps. I to XII • Alexander Maclaren

... one of those little white stars she threw it towards Mr. Linden. It went in a graceful parabolic curve and fell harmlessly, like her ...
— Say and Seal, Volume II • Susan Warner

... have been given to the heads of projectiles, as flat, ogival, hemispherical, conoidal, parabolic, ...
— Scientific American Supplement, No. 803, May 23, 1891 • Various

... is all built in parabolic curves. Why can't you be accurate, Beatrix, as befits your higher education? You took conic sections a year ...
— The Dominant Strain • Anna Chapin Ray

... resistance of the air, and the summit of such curve will rise in proportion as the angle so increases. So long as the falling angle, a, remains less than 45 deg., we shall have a curved shot. When the angle exceeds this, the shot is called "vertical." If we preserve the same charge, the parabolic curve in rising will meet the horizontal plane at a greater distance off. This is, as well known, the process employed for reaching more ...
— Scientific American Supplement, Vol. XXI., No. 531, March 6, 1886 • Various

... forevermore!—clung tightly to me. The sounds seemed to be approaching us, and were accompanied by a lively rattling noise, that seemed to be made by something wooden. Suddenly, as we approached a bend of the road, I saw my youngest nephew appear from some unknown space, describe a parabolic curve in the air, ricochet slightly from an earthy protuberance in the road, and make a final stop in the gutter. At the same time there appeared, from behind the bend, the goat, then the carriage dragging on one side, ...
— Helen's Babies • John Habberton

... light shoots out of this room, and is caught by the huge reflector which you saw me set up at the foot of that tall tree which you can just see against the dark sky over there. That parabolic mirror gathers in the scattered rays, focusses them on the selenium cell which you saw in the middle of the reflector, and that causes the cell to vary the amount of electric current passing through it from a battery of storage cells. It is connected with a ...
— Guy Garrick • Arthur B. Reeve

... faintly to express the nature and scope of its military activity: the universe was its antagonist; its methods that of a projectile. It fought like the angels and devils, in mid-air, cleaving the atmosphere like a bird, describing a parabolic curve and descending upon its victim at just the exact angle of incidence to make the most of its velocity and weight. Its momentum, calculated in foot-tons, was something incredible. It had been seen to destroy ...
— The Collected Works of Ambrose Bierce, Volume 8 - Epigrams, On With the Dance, Negligible Tales • Ambrose Bierce

... little package he had brought, holding it to his eye as if sighting it, his right hand grasping a handle as one holds a stereoscope. A moment later, as I examined it more closely, I saw that instead of looking at anything he had before him a small parabolic mirror ...
— The War Terror • Arthur B. Reeve

... legs to the knees again. We lay still, breathless. A watch chain dangled down in a parabolic loop. Then followed a round face, beef-red with stooping. It ...
— Tramping on Life - An Autobiographical Narrative • Harry Kemp

... Naturalist was travelling in Australia, when he saw a Kangaroo in session and flung a stone at it. The Kangaroo immediately adjourned, tracing against the sunset sky a parabolic curve spanning seven provinces, and evanished below the horizon. The Distinguished Naturalist looked interested, but said nothing for an hour; then he said to ...
— Fantastic Fables • Ambrose Bierce

... other effects of the current. They are chiefly used for lighting halls and railway stations, streets and open spaces, search-lights and lighthouses. They are sometimes naked, but as a rule their brightness is tempered by globes of ground or opal glass. In search-lights a parabolic mirror projects all the rays in any one direction, and in lighthouses the arc is placed in the focus of the condensing lenses, and the beam is visible for at least twenty or thirty miles on clear nights. ...
— The Story Of Electricity • John Munro

... imperative by the growing necessities and altered circumstances of the country. The leading feature of our age is the institution of joint-stock societies. We have taken up very lately the views which AEsop hinted at some thousands of years ago, in his quaint parabolic manner, and which Defoe, who lived a century and a half before his time, most clearly enunciated and described. We have found the way, at last, to make small capitals effect the most gigantic results, by encircling them ...
— Blackwood's Edinburgh Magazine, Volume 62, Number 361, November, 1845. • Various

... on this mirror—bright metal and parabolic. It disperses the light, doesn't concentrate it! Ah! Here is another, and another. This one is bent—broken. They are adjustable. Hm! Micrometer accuracy for reducing the light. The last one could reflect ...
— Astounding Stories of Super-Science February 1930 • Various

... on our Lord's lips, and that in very various connections. He sometimes, as in the instance before us, appended it to teaching which, from its parabolic form, required attention to disentangle the spiritual truth implied. He sometimes used it to commend some strange, new revolutionary teaching to men's investigation—as, for instance, after that great declaration of the nullity of ceremonial ...
— Expositions of Holy Scripture - St. Matthew Chaps. IX to XXVIII • Alexander Maclaren

... not offer a case in point; in the second place, were it in point, it might be fairly and strongly urged against the practice of invoking the spirit of any departed mortal, even the father of the faithful himself. For what are the circumstances of the parabolic representation? A lost spirit in the regions of torment prays to Abraham in the regions of the blessed, and the spirit of the departed patriarch professes himself to have no power to grant the request of the departed and condemned spirit. [Luke xvi. 19.] The practice indeed of our Roman Catholic ...
— Primitive Christian Worship • James Endell Tyler

... workbench, standing amid a litter of metal chips and scraps of color-coded wire, was the Bunch's second ionic, full-size this time, and almost finished. On crossed arms it mounted four parabolic mirrors; its ion guide was on a universal joint. Out There, in orbit or beyond, and in full, spatial sunlight, its jetting ions would deliver ten pounds ...
— The Planet Strappers • Raymond Zinke Gallun

... offends by what I may call an affected virility, is always distinguished. You feel that Mr. Parker considers his sentences, not letting his bolts fly at a venture, but aiming at his effects deliberately. It is the trick of promising youth to shoot high and send its phrases in parabolic curves over the target. But a slight wildness of aim is easily corrected, and to see the target at all is a more conspicuous merit than the public imagines. Now Mr. Parker sees his target steadily; he has ...
— Adventures in Criticism • Sir Arthur Thomas Quiller-Couch

... do not know that it is directly in the line of the Prophet's vision; and that is—a Christian Church should neither depend on, nor be cribbed and cramped by, men-made defences of any kind. Luther tells us somewhere, in his parabolic way, of people that wept because there were no visible pillars to hold up the heavens, and were afraid that the sky would fall upon their heads. No, no, there is no fear of that happening, for an unseen hand holds them up. A church that hides behind the ...
— Expositions of Holy Scripture - Ezekiel, Daniel, and the Minor Prophets. St Matthew Chapters I to VIII • Alexander Maclaren

... and strengthened by Kepler. Cassini seemed likely to win for Italy the glory of completing the great structure; but he was sadly fettered by Church influences, and was obliged to leave most of the work to others. Early among these was Hevel. He gave reasons for believing that comets move in parabolic curves toward the sun. Then came a man who developed this truth further—Samuel Doerfel; and it is a pleasure to note that he was a clergyman. The comet of 1680, which set Erni in Switzerland, Mather in New England, and so many others in all parts of the world at declaiming, ...
— History of the Warfare of Science with Theology in Christendom • Andrew Dickson White

... might make a reading upon the point where the apparatus was being operated by another person. He was led by his experiments to suggest the application of mirrors to lighthouses. His device was essentially a parabolic mirror similar to the reflectors now widely used in automobile head-lamps, search-lights, etc. He employed the lime-light as a source of light and was enthusiastic over the results obtained. His discussion published in 1826 indicates that little practical work had been done up to ...
— Artificial Light - Its Influence upon Civilization • M. Luckiesh

... hospitals, heating plant, and railroads that portends an eventual change in location. The Observatory has grown rapidly since its establishment by Dr. Tappan in 1852. The building was last remodeled and enlarged in 1911 when a reflecting telescope, with a 37-5/8 inch parabolic mirror, largely made in the shops of the University, was installed. In light gathering power this instrument is in a class with the Lick and Yerkes refractors, and it is at least as effective in astronomical photography, the purpose for which it was designed. The new brick ...
— The University of Michigan • Wilfred Shaw

... picked out a minute point of light, moving comparatively rapidly against the stars, and knew it to be the searchlight of the Kondal. Soon the two vessels were almost side by side, moving cautiously forward, and Seaton set up a sixty-inch parabolic reflector, focused upon a coil. As they went on, the purple light continued to flash more and more rapidly, but still nothing ...
— Skylark Three • Edward Elmer Smith

... merely a source of light, and of course, of heat, which is placed at the focus of a parabolic reflector so that all of the rays emanating from the source travel in parallel lines. A searchlight, of course, gives off heat. If we place a lens of the same size as the searchlight aperture in the path of the ...
— Astounding Stories of Super-Science, March 1930 • Various

... question, there it stood, nearly ready. Just behind the great hissing locomotive, with its parabolic headlight and its coal-laden tender, came the baggage, mail, and express cars; then the passenger coaches, in which the social condition of the occupants seemed to be in inverse ratio to their distance from the engine. First came emigrants, "honest miners," "cow-boys," and laborers; ...
— Stories by American Authors, Volume 6 • Various

... Gondran snatched their prey from them in the Chateau; whereupon they hurried to the Stables, and took horse there. But the generous Diomedes' steeds, according to Weber, disdained such scoundrel-burden; and, flinging up their royal heels, did soon project most of it, in parabolic curves, to a distance, amid peals of laughter: and were caught. Mounted National Guards ...
— The French Revolution • Thomas Carlyle

... the priest, the moral, such as it is, and the last pages, such as, alas! they are. And I may even say that in this case the moral itself was given me; for it arose immediately on a comparison of the mother and the daughter, and from the hideous trick of atavism in the first. Sometimes a parabolic sense is still more undeniably present in a dream; sometimes I cannot but suppose my Brownies have been aping Bunyan, and yet in no case with what would possibly be called a moral in a tract; never with the ethical narrowness; ...
— Across The Plains • Robert Louis Stevenson

... ball on the second attempt. It did not go far, it is true, but it went gracefully, describing a parabolic curve considerably to the right of ...
— John Henry Smith - A Humorous Romance of Outdoor Life • Frederick Upham Adams

... skill was invoked, and lamps reinforced by parabolic reflectors poured their light upon the sea. Several of these lamps were sometimes grouped together so as to intensify the light, which at a little distance appeared as if it emanated from a single source. This ...
— Fragments of science, V. 1-2 • John Tyndall

... recovery from the barbarism that engulfed Western Europe after the fall of Rome, and the generation of those vital forces that for two centuries were to infuse society with a vigour almost unexampled in its potency and in the things it brought to pass. The parabolic curve that describes the trajectory of Mediaevalism was then emergent out of "chaos and old night" and Abelard and his opponent, St. Bernard, rode high on the mounting force in its swift ...
— Historia Calamitatum • Peter Abelard

... travel in long elliptical or parabolic orbits round the sun at great velocities. They seem to consist partly of glowing vapours, especially hydrogen, and partly of meteoric stones. 'Shooting stars,' that is to say, stones which fall to the earth, are known to swarm in their ...
— A Trip to Venus • John Munro

... from a cannon, moved in a straight horizontal line until the propulsive force was exhausted, and then fell to the ground in a perpendicular line. Galileo taught that the projectile begins to fall at once on leaving the mouth of the cannon and traverses a parabolic course. According to his idea, which is now familiar to every one, a cannon-ball dropped from the level of the cannon's muzzle will strike the ground simultaneously with a ball fired horizontally from the cannon. As to ...
— A History of Science, Volume 2(of 5) • Henry Smith Williams

... the Dictaean cave, where he was nourished with honey and goat's milk by the nymph Amaltheia until the time was ripe for his vengeance upon his father. (It has been suggested that in this somewhat grotesque legend we have a parabolic representation of one of the great religious facts of that ancient world—the supersession by the new anthropomorphic faith of the older cult, whose objects of adoration, made without hands, and devoid of human likeness, were sacred stones ...
— The Sea-Kings of Crete • James Baikie

... would take his way over the pool to the meadow of the blue flag-flowers. The master of the pool would turn up a fierce eye, and watch the swimmer's progress breaking the golden surface into long, parabolic ripples; but he was too wise to court a trial of the ...
— The Watchers of the Trails - A Book of Animal Life • Charles G. D. Roberts

... stream, while the lighter atoms might be carried away to the outer boundaries of the vortex, to congregate at leisure, and, after the lapse of a thousand years, to again face the radial stream in a more condensed mass, and to force a passage to the very centre of the vortex, in an almost parabolic curve. That space is filled with isolated atoms or planetary dust, is rendered very probable by a fact discovered by Struve, that there is a gradual extinction in the light of the stars, amounting to a loss of ...
— Outlines of a Mechanical Theory of Storms - Containing the True Law of Lunar Influence • T. Bassnett

... of several chains united at the extremity, as thus: a a mark of d, b of e, c of f, d e f of n, therefore a b c a mark of n. Suppose, for example, the following combination of circumstances: 1st, rays of light impinging on a reflecting surface; 2d, that surface parabolic; 3d, those rays parallel to each other and to the axis of the surface. It is to be proved that the concourse of these three circumstances is a mark that the reflected rays will pass through the focus of the parabolic surface. Now, ...
— A System Of Logic, Ratiocinative And Inductive • John Stuart Mill

... working of mirrors from mere chance to a fair amount of certainty. By bringing my mathematical knowledge to bear on the subject, I had devised a method of testing and measuring my work which, I am happy to say, has been fairly successful, and has enabled me to produce the spherical, elliptic, parabolic, or hyperbolic curve in my mirrors, with almost unvarying success. The study of the practical working of specula and lenses has also absorbed a good deal of my spare time during the last two years, and the work involved ...
— Men of Invention and Industry • Samuel Smiles

... said. I sighed. A mile further on we came into the smiling green vlei. 'This was black a while back,' he said. 'Doesn't the fire help a bit after all? Who wants that moldy stuffy old feed, isn't it parabolic of that fusty Dutch-Anglo dorp and its prejudices? What are they meant for, and it? 'Fuel of fire,' say I.' I smiled indulgently. Since we had got into town things had happened. We had had our memorial services for the Dead that last night, and this same morning. It was the week of All Hallows ...
— Cinderella in the South - Twenty-Five South African Tales • Arthur Shearly Cripps

... air-navigator, plunging amid torn parachutes, sand-bags, and confused wreck, fast enough into the jaws of the Devil! Suffice it to know that Teufelsdroeckh rose into the highest regions of the Empyrean, by a natural parabolic track, and returned thence in a quick perpendicular one. For the rest, let any feeling reader, who has been unhappy enough to do the like, paint it out for himself: considering only that if he, for his perhaps comparatively ...
— Sartor Resartus, and On Heroes, Hero-Worship, and the Heroic in History • Thomas Carlyle

... different points of view, they fly to other remote parts of the universe, and do not condescend to show themselves again for a hundred years or so. Such is the erratic conduct of a heavenly body whose course is regulated by a parabolic curve. ...
— The Romance of Mathematics • P. Hampson

... and drop a stone on the embankment, without throwing it. Then, disregarding the influence of the air resistance, I see the stone descend in a straight line. A pedestrian who observes the misdeed from the footpath notices that the stone falls to earth in a parabolic curve. I now ask: Do the "positions" traversed by the stone lie "in reality" on a straight line or on a parabola? Moreover, what is meant here by motion "in space" ? From the considerations of the previous section the answer is self-evident. In the first place we entirely shun the vague word "space," ...
— Relativity: The Special and General Theory • Albert Einstein

... succeeded were connected with each of these three points. To solar light, an artificial one has been preferred. D'Acquapendentus' bottle has given way to the convex lens, and to concave, spherical, and parabolic mirrors, etc. De Hilden's speculum has been replaced by cylindrical, conical, bivalve, and other ...
— Scientific American Supplement, No. 488, May 9, 1885 • Various

... however, to understand how an aviator knows where or when to drop the bomb from a swiftly-moving machine. Several things must be taken into consideration, such as the height of the machine from the earth; its speed, and the parabolic curve that the bomb will take on its flight ...
— Aeroplanes • J. S. Zerbe***

... venial treason bent, Frame thyself a government, For thy crest a brirnless hat, Poverty's aristocrat! Nonne habeam te tristem, Planet of the human system? Comet lank and melancholic —Orbit shocking parabolic— Seen for a little in the sky Of the world of sympathy— Seldom failing when predicted, Coming most when most restricted, Dragging a nebulous tail with thee Of hypothetic vagrancy— Of vagrants large, and vagrants small, Vagrants scarce visible at all! Matchless oracle of woe! Anarchy in embryo! ...
— What's Mine's Mine • George MacDonald

... rapidly increased the power and perfection of his telescopes. Mirrors of seven, ten, even twenty feet focal length, were successively completed, and unprecedented magnifying powers employed. His energy was unceasing, his perseverance indomitable. In the course of twenty-one years no less than 430 parabolic specula left his hands. He had entered upon his forty-second year when he sent his first paper to the Philosophical Transactions; yet during the ensuing thirty-nine years his contributions—many of them elaborate treatises—numbered ...
— A Popular History of Astronomy During the Nineteenth Century - Fourth Edition • Agnes M. (Agnes Mary) Clerke

... navigation attained to by means of our modern Light-house system is of the first consequence in commerce and international communication, which means the spread of science, enlightenment and religion throughout the world. M. Lenoir placed Argand lamps with parabolic mirrors or reflectors in the lantern, which is, as it appears, a glass room on the summit of the tower entered by a trap-door at the head of a spiral staircase. Such a great change having been brought ...
— Illustrated Science for Boys and Girls • Anonymous

... ponderous speeches, clumsy compliments, and tender inquiries after all relations they could possibly think of; after tiring parabolic sentences with fine sounds but no meaning; after repeated blowing of the nose and loud coughing, which always came on opportunely when we asked whether they had yet come to a conclusion as to what we should be allowed to do, at last, when ...
— In the Forbidden Land • Arnold Henry Savage Landor

... pointed out that these curves evidently had reference to the orbits of comets, which are variously parabolic, hyperbolic, or elliptic. If either of the first two, the comet, after once appearing within the range of terrestrial vision, would vanish forever in the outlying regions of space; if the last, it would be sure, sooner or later, after ...
— Off on a Comet • Jules Verne

... substantially the same thing, and are of a parabolic nature. The one adduces the metaphor of a race: 'Footmen have beaten you, have they? Then how will you run with cavalry?' The other is more clear in the Revised Version rendering: 'Though in a land of peace you are secure, what will you do in Jordan when it swells?' The 'swelling of Jordan' ...
— Expositions of Holy Scripture - Isaiah and Jeremiah • Alexander Maclaren

... pastime merely; and especially while that insuperable obstacle to any adequate examination of them, which the received history of the works themselves created, was still operating on the criticism. The truths which these Parabolic and Allusive Poems wrap up and conceal, have been safely concealed hitherto, because they are not those common-place truths which we usually look for as the point and moral of a tale which is supposed to have a moral or politic intention,—truths which we are understood to be in possession ...
— The Philosophy of the Plays of Shakspere Unfolded • Delia Bacon

... leprosy is parabolic. Leprosy itself is a 'parable of death.' The horrible loathsomeness, the contagiousness, the non-curableness, etc. So the man was shut out from camp and from sanctuary. There was a double process in the cleansing rite, ...
— Expositions of Holy Scripture - Genesis, Exodus, Leviticus and Numbers • Alexander Maclaren

... to aim lower than the mark, in order to allow for an upward kick at the discharge; and, on the other hand, it was necessary, in shooting with heavy ordnance, to aim higher than the mark, in order to allow for a parabolic droop of the cannon-ball in transit. Many dramatists, in their endeavor to score a hit, still employ these compromising tricks of marksmanship: some aim lower than the judgment of their auditors, others aim higher than their taste. But, in view of the fact that under present metropolitan ...
— The Theory of the Theatre • Clayton Hamilton

... that by which he showed that the line that regards the right angle in a triangle is equivalent to the two lines that contain that angle, or the problem about the area of the parabolic section of a cone. And Archimedes's servants were forced to hale him away from his draughts, to be anointed in the bath; but he notwithstanding drew the lines upon his belly with his strigil. And when, as he was washing (as the story goes of him), he thought of a manner of computing the proportion ...
— Essays and Miscellanies - The Complete Works Volume 3 • Plutarch

... companions were waiting to see me return, so I mounted after him, knelt again, and held my breath. This time, knowing what was coming, I caught a glimpse of our descent, and found that only the first plunge from the brink was threatening. The lower part of the curve, which is nearly a parabolic line, is more gradual, and the seeming headlong fall does not last more than the tenth part of a second. The sensation, nevertheless, is very powerful, having all the attraction, without the reality, ...
— The Atlantic Monthly, Volume 16, No. 93, July, 1865 • Various

... stars, were additional discoveries for our knowledge of which we are indebted to Galileo and his telescope. Galileo made many other important discoveries in mechanical and physical science. He detected the law of falling bodies in their accelerated motion towards the Earth, determined the parabolic law of projectiles, and demonstrated that matter, even if invisible, ...
— The Astronomy of Milton's 'Paradise Lost' • Thomas Orchard

... cold, was in and out among the screws on the door, had put up the shutters, and simultaneously with the last word stood in the half-opened door and, all unseen by his employer, waved his hand to some one at the corner of the court. He then walked as quickly as his little, bent legs—parabolic were they in outline, but, as this is not a geometric treatise, it is of no particular consequence—would permit him up the long aisle in the centre of the room, and sent off timid little echoes of his steps to ramble away among the bales ...
— In the Yule-Log Glow, Book I - Christmas Tales from 'Round the World • Various

... the strangers who they were, and how their predicament had come about. He flung his glowing cigar away into the night. But Samburan was no longer a solitude wherein he could indulge in all his moods. The fiery parabolic path the cast-out stump traced in the air was seen from another veranda at a distant of some twenty yards. It was noted as a symptom of importance by an observer with his faculties greedy for signs, and in a state of alertness tense enough almost to ...
— Victory • Joseph Conrad

... astronomer knew it, but none had been able to imitate or to reproduce this miracle of nature. When a comet approaches the sun, the orbit in which it travels indicates that it is moving under the impulse of the sun's gravitation. It is in reality falling in a great parabolic or elliptical curve through space. But, while a comet approaches the sun it begins to display—stretching out for millions, and sometimes hundreds of millions of miles on the side away from the sun—an immense luminous train called its tail. This train ...
— Edison's Conquest of Mars • Garrett Putman Serviss

... the magnificent development of the social life, equally governs the fate and the parabolic ...
— Socialism and Modern Science (Darwin, Spencer, Marx) • Enrico Ferri

... to ascertain whether this was or was not the man whom I wanted. In the passage it was too dark to see either his finger-tips or the minute texture of his hair; but my candle-lamp, with its parabolic reflector, would give ample light. I ran through into the museum, where it was still burning, and, catching it up, ran back with it; but I had barely reached the prostrate figure when I heard someone noisily opening the street door with a latch-key. The ...
— The Uttermost Farthing - A Savant's Vendetta • R. Austin Freeman

... bearings and position of objects, and is usually found, when admitted into a rifle club, to equal, without previous practice, its second-rate shots. He only falls short of its first-rate ones, because, uninitiated by the experience of his profession in the mystery of the parabolic curve, he fails, in taking aim, to make the proper allowance for it. The mason is almost always a silent man: the strain on his respiration is too great, when he is actively employed, to leave the necessary freedom to ...
— My Schools and Schoolmasters - or The Story of my Education. • Hugh Miller

... the snowy head of Kinchinjhow, over which the milky-way and the broad flashing orbs of the stars formed a jewelled diadem. The night was very windy and cold, though the thermometer fell no lower than 22 degrees, that placed in a polished parabolic reflector to 20 degrees, and another laid ...
— Himalayan Journals (Complete) • J. D. Hooker

... and Clifton steel arch (fig. 32) replaces the older Roebling suspension bridge. The centre span is a two-hinged parabolic braced rib arch, and there are side spans of 190 and 210 ft. The bridge carries two electric-car tracks, two roadways and two footways. The main span weighed 1629 tons, the side spans 154 and 166 tons (Buck, Proc. Inst. C.E. cxliv. p. 70). Prof. Claxton Fidler, speaking of the arrangement adopted ...
— Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 - "Brescia" to "Bulgaria" • Various

... completely to unsettle any claim that this Creole climate might make to character, the hurricane leaves its awful trace upon the island. This rotating storm of wind has its origin to the east of the Caribbee Islands; its long parabolic curve sweeps over them, and bends to the northeast below Florida. In its centre, as it moves, it carries a lull whose breadth varies from five to thirty miles. This dreadful calm comes suddenly in the height of the storm, and is as suddenly interrupted, after lasting ...
— Atlantic Monthly, Vol. 9, No. 56, June, 1862 • Various

... suspended owing to the mirage." This sentence from one of Sir Stanley Maude's despatches struck me as parabolic. There are other, and vaster, issues than a strategic victory on the Diala River which have been "suspended owing to the mirage." Let us apply ...
— Prime Ministers and Some Others - A Book of Reminiscences • George W. E. Russell

... rose so suddenly that they appeared to spring out of the ground. Then came the peculiar twang of Indian bows. There were showers of sparks and little streaks of fire with long tails like comets winged their parabolic flight toward the cabin. Falling short they hissed and sputtered in the grass. Jonathan's rifle spoke and one of the fleeing forms tumbled to the earth. A series of long yells from all around the Fort greeted this last shot, but not ...
— Betty Zane • Zane Grey



Words linked to "Parabolical" :   parable, rounded, parabola



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