a province of France, which makes part of Guienne, bounded on the north by Angoumois and a part of Marche, and on the east by Quercy and Limosin; on the south by Agenois and Bazadois; and on the west, by Bourleois, Angoumois, and a part of Saintonge. It is about 83 miles in length, and 60 in breadth. It abounds in iron mines, and the air is pure and healthy. Perigueux is the capital town.

PERIGORD-Stone, an ore of manganese, of a dark grey colour, like the basaltes or trapp. It may be scraped with a knife, but is extremely difficult to be broken. It is found of no regular figure, is very compact, heavy, and as black as charcoal. Its appearance is glittering and striated, like the ore of antimony; its particles being disposed in the form of needles, crossing one another without any agglutination, inasmuch that some are loose as iron-filings when stuck to a lodestone; resembling the scoria from a blacksmith's furnace. By calcination it becomes harder and of a reddish-brown colour, but is not attracted by the magnet. It has a considerable specific gravity, does not melt per se, but with borax runs into a glass of the colour of an amethyst. It is scarcely affected by nitrous acid without the addition of sugar. It seems also to contain some argill and iron. It is met with in Gascony and Dauphiny in France, and in some parts of England. It is employed by the French potters and enamellers in the glassy varnish of their earthen wares.

PERIGRAPHÉ, a word usually understood to express a careless or inaccurate delineation of anything; but in Vesalius it is used to express the white lines or impressions that appear on the musculus rectus of the abdomen.