Sandstone, how formed Shales _Sigillaria_ South American coals Spores of _lepidodrendron_ Spores, resinous matter in Spores, inflammability of Steel-mill _Sternbergia_ _Stigmaria_ Subsidence throughout coal-era Surturbrand at Brighton Sussex iron-works T. Tar Testing pits by the candle Texas coal Toluene, discovery of Torbanehill mineral Trappers U. Underclays Uses to which coal is put V. Vaseline Vegetation of the coal age Ventilation of coal-pits W. "Washers" Waste of fuel Wealden lignite Westphalian coal-field Y. Young's Paraffin Oil Z. Zoroastrians End of Project Gutenberg's The Story of a Piece of Coal, by Edward A. Martin