Significados de fusible substance en inglés

There is also added some more fusible substance, such as feldspar, gypsum, or lime, together with some pure quartz.

Consequently, this fixed substance, which is now, properly speaking, a perfect coal, had been originally an oily bituminous or fusible substance.

Although it is a very difficultly fusible substance, yet in the electric furnace it can be made to melt and even boil.