Immaggine:The Standard Time System in The United States Adopted on This Site--October 11, 1883, Continental Illinois Bank Building, Chicago, Illinois (9181564700).jpg
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DescriçiónThe Standard Time System in The United States Adopted on This Site--October 11, 1883, Continental Illinois Bank Building, Chicago, Illinois (9181564700).jpg |
In 1870 Charles F. Dowd had proposed four time zones based on the meridian through Washington, DC for North American railroads. In 1872, he recommended the Greenwich meridian. Sandford Fleming, a Canadian, proposed worldwide Standard Time at a meeting of the Royal Canadian Institute on February 8, 1879. Cleveland Abbe advocated standard time to better coordinate international weather observations and resultant weather forecasts, which had been coordinated using local solar time. He recommended four time zones across the contiguous United States, based upon Greenwich Mean Time, in 1879. The General Time Convention (renamed the American Railway Association in 1891), an organization of American railroads aimed at coordinating schedules and operating standards, became increasingly concerned that if the United States government adopted a standard time scheme it would work to the disadvantage of its member railroads. William F. Allen, the secretary of the General Time Convention, argued that North American railroads should adopt a five zone standard, similar to the one in use today, to avoid government action. On October 11, 1883, the heads of the major railroads met in Chicago at the former Grand Pacific Hotel and agreed to adopt Allen's proposed system. The members agreed that on Sunday, November 18, 1883, all United States and Canadian railroads would readjust their clocks and watches to reflect the new five zone system on a telegraph signal sent from the Allegheny Observatory in Pittsburgh at exactly noon on the 90th meridian. Although most railroads adopted the new system as scheduled, some did so early on October 7 and others late on December 2. The Intercolonial Railway serving the Canadian maritime provinces of New Brunswick and Nova Scotia just east of Maine decided not to adopt Intercolonial Time based on the 60th meridian west of Greenwich, instead adopting Eastern Time, so only four time zones were actually adopted by U.S./Canadian railroads in 1883. Major American observatories, including the Allegheny Observatory, the United States Naval Observatory, the Harvard College Observatory, and the Yale University Observatory, agreed to provided telegraphic time signals at noon Eastern Time. en.wikipedia.org/wiki/Standard_time en.wikipedia.org/wiki/Wikipedia:Text_of_Creative_Commons_... |
Dæta | |
Vivàgna | The Standard Time System in The United States Adopted on This Site--October 11, 1883, Continental Illinois Bank Building, Chicago, Illinois |
Aotô | Ken Lund from Reno, Nevada, USA |
Luogo dello scatto | 41° 52′ 41,48″ N, 87° 37′ 55,99″ W | Posizione di questa e altre immagini su: OpenStreetMap | 41.878188; -87.632220 |
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Questa immagine è stata originariamente caricata su Flickr da Ken Lund all'indirizzo https://flickr.com/photos/75683070@N00/9181564700. È stata controllata in data 2 màrso 2017 dal robot FlickreviewR ed è stato confermato il suo rilascio sotto i termini della licenza cc-by-sa-2.0. |
2 màrso 2017
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raffigura italian
creatore italian
Valô a brettio ma sensa un elemento Wikidata
stato del copyright italian
coperto da diritti d'autore italian
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27 zùg 2013
immagine catturata con italian
Canon PowerShot SX130 IS ingleise
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41°52'41.477"N, 87°37'55.992"W
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Dæta/Ôa | Miniatûa | Dimenscioìn | Uténte | Coménti | |
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prezénte | 03:40, 2 màr 2017 | 3 000 × 4 000 (3,76 MB) | Victorgrigas | Transferred from Flickr via Flickr2Commons |
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Produtô da màchina fotogràfica | Canon |
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Modéllo màchina fotogràfica | Canon PowerShot SX130 IS |
Ténpo d'espoxiçión | 1/60 s (0,016666666666667) |
Rapòrto focâ | f/3,4 |
Senscibilitæ ISO | 80 |
Dæta e ôa de creaçión di dæti | 00:41, 27 zùg 2013 |
Distànsa focâ de l'òbietîvo | 5 mm |
Òrientaménto | Normâle |
Resoluçión òrizontâle | 180 punti per pollice (dpi) |
Resoluçión verticâle | 180 punti per pollice (dpi) |
Software | Microsoft Windows Photo Gallery 6.0.6001.18000 |
Dæta e ôa de modìfica do file | 21:08, 27 zùg 2013 |
Poxiçionaménto di conponénti Y e C | Co-scitoòu |
Versción do formâto Exif | 2.3 |
Dæta e ôa de digitalizaçión | 00:41, 27 zùg 2013 |
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Modalitæ de conpresción inmàgine | 3 |
Veloçitæ de l'oturatô APEX | 5,90625 |
Avertûa APEX | 3,53125 |
Coreçión espoxiçión | −0,33333333333333 |
Avertûa màscima | 3,53125 APEX (f/3,4) |
Método de mezuaçión | Pattern |
Caraterìstiche e stæto do flash | O flash o no l'é scatòu, rimoçión forsâ do flash |
Valutaçión (in sce 5) | 0 |