CHAP. 16.—OCHRA: REMEDIES DERIVED FROM RUBRICA.
It is from rubrica also, that ochra[1877] is prepared, the rubrica being burnt[1878] in new earthen pots well luted with clay. The more highly it is calcined in the furnace, the better the colour is. All kinds of rubrica are of a desiccative nature, and hence it is that they are so useful for plasters, and as an application even for erysipelas.