Coal assay heating value is based on the moisture content as mined, but without any free water. The ISO has a coal ranking system that also ranks coals; the sub-divisions do not align with the ASTM standard. "Coal Analytical Methods" Blackwell Scientific Press, 1984. Coal assay Coal analysis techniques are specific analytical methods designed to measure the particular physical and chemical properties of coals. These methods are used primarily to determine the suitability of coal for coking, power generation or for iron ore smelting in the manufacture of steel. Coal comes in four main types or ranks: lignite or brown coal, bituminous
Bolton Brown Bolton Brown Bolton Coit Brown (November 27, 1864 – September 15, 1936) was an American painter, lithographer, and mountaineer. He was one of the original founders of the Byrdcliffe Colony in Woodstock, NY, part of what is now referred to as the Woodstock Art Colony. Brown was born and raised in Dresden, in upstate New York. His sister was the scientific illustrator Anna B. Nash. After receiving his Masters in Painting from Syracuse University, he moved to California in 1891 to create the Art Department at Stanford University. Brown headed the department for almost ten years, but was dismissed in