WHITE LEAD, a sort of calx of lead made by exposing plates of that metal to the vapour of vinegar. See Chemistry Index.

Ceruss as a medicine, is used externally, either mixed in ointments or by sprinkling in on old gleeting and watery ulcers, and in many diseases of the skin. If, when it is reduced into a fine powder, it is received with the breath in inspiration, and carried down into the lungs, it causes incurable asthmas. Instances of the very pernicious effects of this metal are too often seen among those persons who work lead in any form, but particularly among the workers in white lead.

The painters use it in great quantities; and that it may be afforded cheap to them, it is generally adulterated with common whitening.