Spanish brown, or brown red, is a native earth, found in the state, and of the colour in which it is used: it is nearly of the same colour with the Venetian red, but fouler. It was probably from its name brought originally from abroad, and was then most likely of a finer kind: but what is now used is the produce of our own country, being dug up in several parts of England.,It is used for grounds and priming for coarse work by house-painters; and by colourmen in the preparation of the cloths for pictures and other coarse work: but seldom in any more delicate paintings. It therefore needs no other preparation than freeing it well from stones and filth: tho' if any who may be desirous to use it for nicer purposes, want ot have it in a more perfect state, they may make it equal, in fineness and purity ot any other pigments whatever, by washing over: and, if they can render it useful to them with regard to the colour, they may depend on its standing equally with any other pigment whatever; being a native ochrous earth, of which kind none are ever known to fail, whether they be used of their natural teint, or changed by calcination.