| 单词 | magnetic meridian |
| 例句 | A periodic current thus flowed in one direction relatively to the coil in one half-turn from a position perpendicular to the magnetic meridian, and in the opposite direction in the next half-turn. Lord Kelvin An account of his scientific life and work 2012-04-06T02:00:32.097Z The first symptom of an aurora borealis is commonly a low arch of pale, greenish-yellow light, placed at right angles to the magnetic meridian. Meteorology or Weather Explained 2012-02-20T03:00:18.847Z When used, the dip needle must be set so that the plane in which the needle swings contains the magnetic meridian, as indicated by the horizontal needle. Hawkins Electrical Guide, Number One Questions, Answers, & Illustrations, A Progressive Course of Study for Engineers, Electricians, Students and Those Desiring to acquire a Working Knowledge of Electricity and its Applications 2011-12-24T03:07:54.823Z Neither dazed nor dazzled, his brain had swung true to the magnetic meridian of his faith. The Black Opal 2011-07-13T02:00:16.323Z A bent wire, carrying a small magnetic needle, is balanced on the steel point, so that the magnet, with the fine wire, arranges itself horizontally in the direction of the magnetic meridian. A Treatise on Meteorological Instruments Explanatory of Their Scientific Principles, Method of Construction, and Practical Utility 2011-06-19T02:00:15.717Z Deviation of the Compass, the deflection of a ship's compass needle from the magnetic meridian, caused by adjacent iron. The New Gresham Encyclopedia Volume 4, Part 1: Deposition to Eberswalde 2011-04-14T02:00:57.977Z Columbus thus determined a place on the Atlantic in which the magnetic meridian coincided with the geographical and in which the needle stood true to the pole. The Century of Columbus 2011-01-29T03:00:17.380Z It seems unnecessary to note that our magnetic coil can be placed in the direction of the magnetic meridian or at any arbitrary angle with it.... The Earliest Electromagnetic Instruments The points where the magnetic intensity is at a minimum, on the magnetic meridian, are the warmest points of that meridian, and those where it is most intense, the coldest. The Philosophy of the Weather And a Guide to Its Changes The vertical plane passing through the longitudinal axis of such a needle is known as the magnetic meridian. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 7 "Columbus" to "Condottiere" This direction, which the meteor must have followed, is exactly that of the magnetic meridian, which is a remarkable result. The Rain Cloud or, An Account of the Nature, Properties, Dangers and Uses of Rain in Various Parts of the World It is well known that the needle of the compass, when free to move horizontally, oscillates upon its pivot and settles in a direction termed the magnetic meridian. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 3 "Destructors" to "Diameter" “When the plate was in the magnetic meridian, or in any other plane coinciding with the magnetic dip, then its rotation produced no effect upon the galvanometer.” Little Masterpieces of Science: Invention and Discovery Another class originate at the N. W., and extend gradually south easterly on the magnetic meridian. The Philosophy of the Weather And a Guide to Its Changes If there is a true meridian on the map, but not a magnetic meridian, one may be constructed as follows, if the magnetic declination is known: Fig. Manual of Military Training Second, Revised Edition An arc of the horizon intercepted between the azimuth circle of a celestial object and the magnetic meridian. The Sailor's Word-Book An Alphabetical Digest of Nautical Terms, including Some More Especially Military and Scientific, but Useful to Seamen; as well as Archaisms of Early Voyagers, etc. The direction of the magnetic needle in London, which is called the magnetic meridian, encloses an angle of 24° with the astronomical meridian, this angle being called the Declination of the needle for London. Fragments of science, V. 1-2 The compass had now become perfectly useless, and they judged that they had passed the magnetic meridian at about 100 degrees west latitude, where it would have pointed due south instead of north. Notable Voyagers From Columbus to Nordenskiold In science, I would ask, is "diamagnetism" correctly explained by terming it "the property of any substance whereby it turns itself, when freely suspended, at right angles to the magnetic meridian." Notes and Queries, Number 70, March 1, 1851 A Medium of Inter-communication for Literary Men, Artists, Antiquaries, Genealogists, etc. The author supposes two points, one near each pole, through the northern of which, pass all the magnetic meridians of the northern hemisphere, and through the southern, those of the southern hemisphere. The Writings of Thomas Jefferson Library Edition - Vol. 6 (of 20) A black vertical line or mark in the compass-bowl in the direction of the ship's head, by which the angle between the magnetic meridian and the ship's line of course is shown. The Sailor's Word-Book An Alphabetical Digest of Nautical Terms, including Some More Especially Military and Scientific, but Useful to Seamen; as well as Archaisms of Early Voyagers, etc. Before they were concave to the equator, and now they are convex; the magnetic meridian is therefore deflected the contrary way to what it was in the day time, by the same principle of reaction. Outlines of a Mechanical Theory of Storms Containing the True Law of Lunar Influence The author supposes two points, one near each pole, through the northern of which pass all the magnetic meridians of the northern hemisphere, and through the southern those of the southern hemisphere. Memoir, Correspondence, And Miscellanies, From The Papers Of Thomas Jefferson, Volume 2 There is an imaginary line, extending in a north-westerly direction, through a point in the vicinity of Cape Lookout, called the magnetic meridian, on which there is no variation. Outward Bound Or, Young America Afloat According to our observations the true and magnetic meridians coincided in latitude 20 degrees 0 minutes south and longitude 31 degrees 15 minutes west. A Voyage to the South Sea For The Purpose Of Conveying The Bread-Fruit Tree To The West Indies, Including An Account Of The Mutiny On Board The Ship When the plate was in the magnetic meridian, or in any other plane coinciding with the magnetic dip, then its rotation produced no effect upon the galvanometer. Experimental Researches in Electricity, Volume 1 After the maximum, say at 4 A. M., the deflection gradually ceases, and the magnetic meridian returns to its mean position at 8 or 9 A. M. Outlines of a Mechanical Theory of Storms Containing the True Law of Lunar Influence Where the horizontal force is the weakest, the middle of the luminous arch deviates the most from the magnetic meridian. COSMOS: A Sketch of the Physical Description of the Universe, Vol. 1 Azimuths observed at the anchorage, with three compasses and the ship's head in the magnetic meridian, gave 2� 23' east variation, which corresponded very well with the bearings. A Voyage to Terra Australis — Volume 2 Points noticed requiring confirmation: Arch: centre of arch in magnetic meridian. Scott's Last Expedition Volume I These were connected with each other at their ends, and then extended in the direction of the magnetic meridian, so as to form two nearly parallel lines, nowhere in contact except at the extremities. Experimental Researches in Electricity, Volume 1 Now, this is precisely the direction of the deviation of the magnetic meridian, the needle therefore only follows the meridian, or still continues to point to the temporary magnetic pole. Outlines of a Mechanical Theory of Storms Containing the True Law of Lunar Influence Low down in the distant horizon, about the part of the heavens which is intersected by the magnetic meridian, the sky which was previously clear is at once overcast. COSMOS: A Sketch of the Physical Description of the Universe, Vol. 1 That he had made observations to fix the magnetic meridian, and had discovered a large island, almost the size of Great Britain, which he named Boothea. Personal Memoirs of a Residence of Thirty Years with the Indian Tribes on the American Frontiers It is towards the magnetic meridian of the place that the sky, at first pure, begins to get brownish. The Atlantic Monthly, Volume 04, No. 26, December, 1859 Thus when standing upright in a plane perpendicular to the magnetic meridian, and when consequently its own plane was inclined only about 20� to the dip, revolution of the plate evolved electricity. Experimental Researches in Electricity, Volume 1 This arises from the great angle made by the magnetic meridian at this place, with the terrestrial meridian—the variation being by Barlow’s tables, 30° to the westward. Outlines of a Mechanical Theory of Storms Containing the True Law of Lunar Influence The vertex of this arch was situated in the magnetic meridian, and, as is often the case, the rays darted by the luminous meteor were of all the colours of the rainbow, red predominating. The Fur Country Seventy Degrees North Latitude Dr. Hooke, 1684, remarked that steel or iron was magnetized when heated to redness and placed in the magnetic meridian. Scientific American Supplement, No. 392, July 7, 1883 Their direction was from north-north-west to south-south-east, or more exactly, north 20 degrees west, consequently contrary to the direction of the magnetic meridian. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 3 At the place where the magnetic meridians cross, the only phenomenon produced is the vertical position of the magnetic needle in two similar points of the terrestrial globe. An Antarctic Mystery The dip was on the increase 89 degrees 25' and the declination swung to 40 degrees east of the magnetic meridian. The Home of the Blizzard Being the Story of the Australasian Antarctic Expedition, 1911-1914 At D we have the evident polarity induced by the earth's directive influence when a soft iron rod is held in the magnetic meridian. Scientific American Supplement, No. 392, July 7, 1883 |
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