Anthracite latter in two or three sizes, all three being above in (38 mm) size on round-hole screens. High grade (HG) and ultra high grade (UHG) anthracite are the highest grades of anthracite coal. They are the purest forms of coal, having the highest degree of coalification, the highest carbon count and energy content and the fewest impurities (moisture, ash and volatiles). High grade and ultra high grade anthracite are harder than standard grade anthracite, and have a higher relative density. An example of a chemical formula for high-grade anthracite would be CHONS, representing 94% carbon. UHG anthracite typically has a
Anthracite iron of 1839. In the meantime, Pioneer Furnace, in Pottsville, was blown in using anthracite fuel in 1839. It was built by William Lyman obtained the aid of a Welsh emigrant, Benjamin Perry, who was familiar with Neilson's process and the Yniscedwyn works, for the blowing-in. The furnace ran for three months on anthracite alone and fulfilled the conditions to win the $5,000 prize. In the design of Pioneer Furnace, Lyman had also been assisted by David Thomas, who had arrived in the United States in May 1839. Thomas was engaged by the LC&N to set up the Lehigh Crane Iron