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
Coal Island, New Zealand is one of only nine islands in the area that is completely free of introduced mammalian pests. Since then, endangered endemic birds such as tokoeka (Haast brown kiwi) and mōhua (yellowhead) have been released on the island. Coal Island, New Zealand Coal Island is an island in Fiordland, in the southwest of New Zealand's South Island. Its Māori name is Te Puka-Hereka Island, which translated means The Tied Anchor, but the island is commonly known as Coal Island. Situated at the southern end of Fiordland's west coast, Coal Island lies in the entrance to Preservation Inlet, between Puysegur Point and