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
Eddie Brown (dancer) his dances were filled with syncopated steps and complex patterns. The specific style of tap that he performed and later taught to students was called “scientific rhythm.” Brown explained, “You heard all this music and rhythm but couldn’t see where it was coming from.” Eddie Brown’s natural propensity to hear and create intricate rhythms allowed him to make his mark on the world of tap dance: “A good ear ain’t good or bad, but a good ear is what you need. That’s why tap is scientific.” Eddie Brown (dancer) Eddie Brown, was a dancer born in 1918 in Omaha, Nebraska.