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Keeling Coal Company : ウィキペディア英語版 | Keeling Coal Company The Keeling Coal Company was a nineteenth-century mining company in Allegheny County, Pennsylvania. Its mines were part of the Pittsburgh Coalfield. ==Ormsby Mine and Gravity Plane==
The Ormsby mine was an underground coal mine, originally opened in 1838 by the son-in law of Oliver Ormsby, John Harding Page and Captain Phillips. The mine was served by a gravity plane. or incline, built between 1838 and 1844. It was operated by Doctor Oliver Harrison Ormsby, the son of the above named Oliver Ormsby, from 1851 to 1861. The Keeling Coal Company operated it from 1861 to May 1878, when it was taken over by the Birmingham Coal Company, which had Joseph Keeling as one of its partners. The mine was extensive, eventually connecting to the nearby Bausman Mine, which Keeling also operated. Coal from this mine was used in early steam engine experiments by the U.S. Navy on the ''Michigan''.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Keeling Coal Company」の詳細全文を読む
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