Vitrification or densification is due to the feldspar or fusible sand.

It is fusible at 122° Fahrenheit, and volatile at higher heats.

To be of value a fusible plug should be renewed or changed once a month.

You should act at all times precisely as if there were no fusible plug.

It occurs as a red, crystalline, fusible, deliquescent powder.

A fusible brownish-red, translucent substance, soluble in water.

A greyish-white powder, fusible at a low red heat, insoluble in water, but readily dissolved by hydrochloric acid.

It is malleable, fusible under a red heat; burns in contact with air with a deep red light, and has the sp.

Fusible metal may be allowed to cool in a teacup until just ready to set at the edges, and then poured into the moulds.

Slender, brilliant, colourless needles; fusible at 122 Fahr., and distilling at a higher temperature without decomposition.