The Convention took measures against the emigres and the refractory priests.
Fire-clays include all those varieties of clay which are very refractory to heat.
The materials used in the construction of furnaces are divisible into two classes, namely, ordinary and refractory or fire-resisting.
Made of exceedingly refractory clay, it under went stoving for more than three weeks, and was consequent!) remarkable for its hardness and metallic timbre.
In this process all the anode metals pass into solution except iridium and other refractory metals of that group, which remain as metals, and silver, which is converted into insoluble chloride; lead and bismuth form chloride and oxychloride respectively, and these dissolve until the bath is saturated with them, and then precipitate with the silver in the tank.