| 单词 | magnetic variation |
| 例句 | All the Arctic peoples had been thrown into panic, and so had the animals, not only by the fog and the magnetic variations but by unseasonal crackings of ice and stirrings in the soil. The Subtle Knife 1997-01-01T00:00:00Z Hailey had conducted two expeditions to make the measurements on which the map was based, and the hope was that this would open the way to using magnetic variation to measure longitude. The Invention of Science 2015-09-17T00:00:00Z Each line on the map is like a contour line but, instead of marking a uniform measurement of height, it marks a uniform measurement of magnetic variation. The Invention of Science 2015-09-17T00:00:00Z One set of scans, which uses magnetic variations, showed the 5 hectare site was surrounded by ditches. Rutland mosaic: Surveys reveal large Roman villa complex at site 2022-03-04T05:00:00Z Every five years, the Federal Aviation Administration tests magnetic variation and assigns the values that’ll be used in designating runways. Earth’s magnetic shift to cost Wichita airport 2018-01-13T05:00:00Z Among them is the failure to allow for magnetic variation - causing misreadings in Columbus' compasses - and the apparent impossibility of various moorings. Following Columbus: The team trying to rewrite the explorer's route - BBC News 2016-08-06T04:00:00Z Trade winds and monsoons, charts of magnetic variation, tides and surveys of the Channel coast, and experiments with diving bells were practical activities that occupied his attention. Astronomy: The Science of the Heavenly Bodies 2012-03-17T02:01:02.630Z The latitude, chronometric differences of longitude, and magnetic variation, were determined on shore at this southern point. Narrative of the surveying voyages of His Majesty's ships Adventure and Beagle, between the years 1826 and 1836 Volume I. - Proceedings of the First Expedition, 1826-1830 2012-02-24T03:00:32.793Z He had no idea of the magnetic variation in this part of the Indian Ocean, neither had he any knowledge of the deviation of that particular compass. The Wireless Officer 2011-10-24T02:00:17.560Z A magnetic variation shift greater than 3 degrees prompts changes. Earth’s magnetic shift to cost Wichita airport 2018-01-13T05:00:00Z By the passage of the polar star over the meridian, the magnetic variation at Ankóber was observed, with the aid of a well-regulated chronometer, to be 7 degrees westerly. The Highlands of Ethiopia 2011-02-25T03:01:07.193Z Fog forms at one period of the magnetic variation, cloud at another. The Philosophy of the Weather And a Guide to Its Changes And there's no knowing what compass correction to allow for a pocket compass, and there's the magnetic variation besides. The Boy With the U.S. Miners Latitude, 6° 4' 45" south; longitude, 75° 1' west of Greenwich; magnetic variation, 7° 22' 10" east; thermometer, 79°; elevation above sea-level, 377 feet; distance from the Atlantic, 2482 miles; current, 3 miles per hour. Life of Rear Admiral John Randolph Tucker A superior graduated compass for ascertaining the amount of magnetic variation, by amplitude or azimuth, when the sun is from 8° to 15° high, either after its rising or before its setting. 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. Each day he watched the compasses with attention, and it is to him we owe the discovery of the magnetic variation, of which he took account in his calculations. Celebrated Travels and Travellers Part I. The Exploration of the World Not long since, Gauss, of Germany, invented instruments by which the changes of magnetic variation and force could be accurately determined. Continental Monthly , Vol. 6, No. 1, July, 1864 Devoted to Literature and National Policy. At this camp I found, by a careful observation of alpha and beta Centauri, that the magnetic variation was 8 degrees 56 minutes 15 seconds East. Three Expeditions into the Interior of Eastern Australia, Volume 2 Latitude, 9° 57' 11" south; longitude, 75° 2' west of Greenwich; magnetic variation, 8° 35' 36" east; elevation above the sea-level, 630 feet; distance from the Atlantic, 3100 miles; current, 2-1/2 miles per hour. Life of Rear Admiral John Randolph Tucker By this alone, within three hours on each side of noon, the longitude, latitude, and magnetic variation of a position may be determined. 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. There is a good stone prison here; and there are, besides, a handsome church, a court-house, public offices, many commodious private residences, and a government observatory for noting and recording the magnetic variations. American Notes On the 1st of August 1726, Catherine honoured the meeting with her presence, when Professor G. B. Bilfinger, a German scientist, delivered an oration upon the determination of magnetic variations and longitude. The Project Gutenberg Encyclopedia Volume 1 of 28 At the camp I ascertained the magnetic variation to be 9 degrees 10 minutes 15 seconds East, by an observation of the star Beta Centauri. Three Expeditions into the Interior of Eastern Australia, Volume 2 Latitude, 10° 5' 6" south; longitude, 74° 55' 45" west of Greenwich; magnetic variation, 7° 46' east; distance from the Atlantic, 3123 miles. Life of Rear Admiral John Randolph Tucker The meridian having been established, the magnetic variation or declination may readily be found by setting an instrument on the meridian and noting its bearing as given by the needle. Scientific American Supplement, No. 360, November 25, 1882 Let the magnetic variation be N. 15° W., and the observed bearings A 290, B 320, then the position stands as in Fig. The Sewerage of Sea Coast Towns With the compass I've made and adjusted to the new magnetic variations, and with the maps out of Van's set of books, I reckon we're good for anything, including a trip around the world. Darkness and Dawn By an azimuth of the sun's centre taken this morning, the magnetic variation was observed to be about 20 minutes west. Journals of Australian Explorations Latitude, 10° 20' 3" south; longitude, 74° 54' west of Greenwich; magnetic variation, 7° 59' 26" east; distance from the Atlantic, 3156 miles. Life of Rear Admiral John Randolph Tucker They crossed the line of no magnetic variation, and when the needle of the compass began to change its usual direction, they were sure it was bewitched. A Brief History of the United States The magnetic variation for the year 1910 was about l5 1/2° West of North, and it is moving nearer to true North at the rate of about seven minutes per annum. The Sewerage of Sea Coast Towns Spanish navigators affirm that on these coasts the magnetic variation differs extremely from that observed at sea. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 Dovers made a long series of observations for longitude, latitude and magnetic variation, while Hoadley examined the rocks and took photographs. The Home of the Blizzard Being the Story of the Australasian Antarctic Expedition, 1911-1914 Latitude, 10° 22' 55" south; longitude, 74° 49' west of Greenwich; magnetic variation, 9° 7' 30" east; elevation above sea-level, 700 feet; distance from the Atlantic, 3167 miles; current, 3-1/2 miles per hour. Life of Rear Admiral John Randolph Tucker Moreover, the magnetic variation is 18 degrees 3 degrees at Talcahuano April 23rd, the true meridian bearing to the right of the magnetic. Louis Agassiz: His Life and Correspondence He took the "lay" of the place with a pocket-compass, allowing two seconds for magnetic variation. A Double Barrelled Detective Story One chest contained a sextant, a dipping-needle, an apparatus to determine the magnetic variation, a few thermometers, and Saussure's hygrometer. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 I therefore returned to the camp and helped Dovers take observations for longitude and magnetic variation. The Home of the Blizzard Being the Story of the Australasian Antarctic Expedition, 1911-1914 Like all true investigators, he longed to submit his theory to the test of experiment, and for that purpose Halley determined to observe the magnetic variation for himself. Great Astronomers On these charts he set down lines connecting those localities at which the magnetic variation was identical. Great Astronomers We have the longitude and the latitude, corrected for magnetic variation, and this gives us the exact location of the tragedy. A Double Barrelled Detective Story Observations of corresponding altitudes of the sun having given me the true time, within about 2 seconds, I was enabled to determine the magnetic variation with precision, at noon. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 |
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