a small vessel or cup, used in assaying gold and silver
vessels used to hold the ore and molten metal that was placed in the furnace
A porous cup, often made of bone ash, used in assaying to separate precious metals from base elements such as lead. 2. The bottom or receptacle in a silver-refining furnace.
Small cups made of bone ashes or porous porcelain; principally used for assaying* precious metals which are not oxidated* by heat and air.