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Published online by Cambridge University Press: 01 May 2009
page 415 note 1 The observation of Prahtl (Mem. de l'Acad. de Vienne, t. ii., p. 230Google Scholar; Bischof, , Chem. Géologie, vol. ii., p. 404Google Scholar) of feldspar crystallizing in a mass of glass requires also particular attention.
page 416 note 1 By “scoria” Professor Daubreé may possibly mean a fused mass of oxides and silicates, such as blast-furnace slag, which, in England and France, is known by almost similar terms.