1910–1911
Britannica 11th
Encyclopaedia Britannica · 11th edition
EPSOM SALTS, heptohydrated magnesium sulphate, MgSO4-7HjO, the magnesii sulphas of pharmacy (Ger. Bitter sols). It occurs dissolved in sea water and in most mineral waters, especially in those at Epsom (from which place it takes its name), Seidlitz, Saidschutz and Pullna. It also occurs in nature in fibrous excrescences, constituting the mineral epsomite or hair-salt; and as compact masses (reichardite), as in the Stassfurt mines. It is also found associated with limestone, as in the Mammoth Caves, Kentucky, and wi…
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- Vol. 9, pp. 709-709