“Fossils are of four kinds, viz. saline, earthy, inflammable and metallic; hence arise four classes.” KindClassFourAriseFossilsMetallic Book:The miscellaneous tracts of the late William Withering: to which is prefixed a memoir of his life, character, and writings Source: The miscellaneous tracts of the late William Withering: to which is prefixed a memoir of his life, character, and writings
