In time to pass muster as a gatherer of stones, a graveller, a roller of paths, or it may be a setter of pulse rows, (though by the mass I misdoubt the last, hugely), but never to be taken for what you have vainly boasted yourself […]
Source: wiktionary
Alberger process Chemical Engineering, a process for manufacturing salt by heating brine under high pressure, then passing it to a graveler to remove calcium sulfate.
Source: wiktionary
In the second step of the salt refining process the heated brine then goes into a graveler filled with cobblestones to remove the impurities.
Source: wiktionary
At this point, it is a rolling, boiling stew of salt, a supersaturated brine that is pumped into a long, cylindrical container called a graveler, filled with large lake stones.
Source: wiktionary