Anthracite iron or anthracite pig iron is the substance created by the smelting together of anthracite coal and iron ore, that is using anthracite coal instead of charcoal to smelt iron ores—and was an important historic advance in the late-1830s, enabling a great acceleration of the industrial revolution in Europe and North America. History Unlike many seminal advances, the contributors, place and date of this epoch are well recorded within specific moments in the late 1830s. The first repeatable and reliably successful furnaces and smelts were managed by the same person in both the United Kingdom and the United States, in the principal control and supervision of Ironmaster David Thomas who had begun experimenting with attempts to use locally available Welsh anthracite deposits as early as 1820 soon after he became in charge at Yniscedewin Iron Works in Wales. About this 1837-38 timeframe experiments were also being made in Pennsylvania near Port Carbon, and in Mauch Chunk, but with overall better success than in Wales. White, Hazard and the LC&N Co. had begun systematic experiments to smelt using anthracite in two furnaces in Mauch Chunk in 1832–1837 with intermittent but sporadically improved successes using cold blast processes with two 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 as an ingredient into a reverberatory furnace (and in later years, a Bessemer converter). Anthracite, also known as stone coal or rock coal, is very difficult to ignite, mine, clean, and break into smaller chunks and requires correct conditions to build heat or hold temperature and sustain burning—which oft depend upon the size and uniformity of the coal particles. Yet American cities were cramped for fuels, woodlands were exhausted near bigger towns and Philadelphia, largest city in America needed fuels for mills and foundries as well to sustain manufacturing. Inventor and industrialist Josiah White (owner of a wire mill, foundry and nail factory),