Powder the regulus in a mortar and transfer to a small crucible.

After a few minutes of this Prescott took a small crucible of black lead.

This should be melted down in a small crucible, and the resulting button of lead cupelled.

The sulphate of iron, put in a small crucible, and lightly calcined, produces a suitable red oxide.

I'll need a small crucible.

Daniel flourished his right hand, then pulled off the gold ring and tossed it without ceremony into a small crucible.

Some common quicksilver, which I put into a small crucible on the fire, was, in less than an hour, converted into very good gold.