Abstract As part of a general programme of research on the nature of inorganic melts, a study has been made of the manner in which sulphur is held in liquid silicates and aluminates. Mixtures of CaO-SiO2, MgO-SiO2, FeO-SiO2, CaO-Al2O3 and CaO-SiO2-Al2O3 have been brought into equilibrium, at tempera...