Anthracite Cornwall, which was used as a pigment. The term is also used to refer to some Carboniferous rock strata found in both Britain and in the Rhenish hill countries (the Culm Measures). Lastly, it may refer to coal exported from Britain during the 19th century. In American English, "culm" refers to the waste or slack from anthracite mining, mostly dust and small pieces not suitable for use in home furnaces. Anthracite is similar in appearance to the mineraloid jet and is sometimes used as a jet imitation. Anthracite differs from ordinary bituminous coal by its greater hardness (2.75–3 on the
History of anthracite coal mining in Pennsylvania the building of a canal. By 1840, over 250,000 tons of anthracite mined from the region annually reached Philadelphia through White and Hazard’s Lehigh River system (Dublin, Licht, 12-3). A group of Germans wanted to seek the rights to the Schuylkill River. They received a charter in 1815 to incorporate the Schuylkill Navigation Company, which would have control over the Schuylkill River. After receiving investors the Schuylkill Navigation Company was able to finance a 108-mile long river and canal system that connected the Pottsville area to Philadelphia that opened in 1825. By the early 1840s, some 500,000 tons of anthracite