The calomel must be ground to an impalpable powder, and elutriated.
The softest and purest white chalk, elutriated, made into balls, and well dried.
It is then ground and elutriated with pure cold water, as before.
The elutriated paste or moist powder is then drained, and dried.
The powder when cold is ground in a proper mill, levigated with water, and elutriated, as will be described under Red lead.
At the manufactory it is washed and elutriated with care; and its slip is passed through fine sieves.
The lumps are to be ground along with water between horizontal stones, elutriated, passed through sieves, and dried.
Finally, the vermillion is to be elutriated, in order to separate any particles of running mercury.