Anthracite iron charcoal — long the fuel of preference for smelting and glass making, creating a decades long search for alternative fuels. By mid-1792 prominent Philadelphians had formed the Lehigh Coal Mine Company (LHCM Co.) to bring Anthracite to cities reachable via the Delaware River Valley, especially Philadelphia — the nation's largest and most industrialized city, though no one fully understood how to use anthracite as a sole fuel—just that "it 'could' burn 'some' of the time" with a hot enough base fire, so could augment furnace fuels. The LHCM Co. had great difficulty getting many ark-loads of coal to the docks
Anthracite iron differently designed furnaces. The first American smelt of Anthracite Pig Iron was performed July 4, 1840 by principal-partners David Thomas, Josiah White and Erskine Hazard at their Lehigh Crane Iron Works in their first hot blast furnace along Catasauqua Creek aided by Samuel Thomas and the employees of the LCIW, in what became Catasauqua in Northampton County, Pennsylvania. The technology enabled industries the chance to produce cast iron sufficient to demand and eventually adapt production to also feed the demand to generate wrought iron and steel. These useful materials are achieved by adding additional processing — by taking pig iron