He that is subject to pains in the nerves, as is common in the gout of the hands or feet, ought as much as possible to exercise the part affected, and expose it to labour and cold; unless the pain has become violent, in which case rest is best. Venery is always hurtful. Concoction is necessary, as well in this, as in all disorders of the body: for crudity injures it more than any thing; and whenever the body is out of order, the diseased part feels it most sensibly. As concoction is an adversary to all diseases, so some again are relieved by cold, and others by heat. Either of which every one ought to procure, according to the habit of his body. Cold is hurtful to an old or slender man, to a wound, to the præcordia, intestines, bladder, ears, hips, shoulders, private parts, teeth, bones, nerves, womb, and brain. It also renders the surface of the skin pale, dry, hard, and black. From this proceed shudderings and tremours. But it is beneficial to young people, and all that are of a full habit. The mind also is more brisk, and the concoction goes on better, when ’tis cold, if due care is taken to guard against it. Cold water poured on, besides being useful to the head, does good to the stomach. It is likewise of service to the joints, and pains, which are not attended with ulcers; also to persons, that are too ruddy, if they be free from pain. Heat helps whatever cold hurts; and those too that have blear eyes, if they have neither pain nor an effusion of tears; also contracted nerves, and especially those ulcers which arise from cold. It causes a good colour in the body, and promotes the excretion of urine. In too great a degree, it enervates the body, softens the nerves, and relaxes the stomach. But neither cold nor heat is by any means safe, coming suddenly upon persons unaccustomed to it; for cold occasions pains in the sides, and other disorders, and cold water causes scrophulous swellings; heat hinders concoction, prevents sleep, wastes by sweat, and renders the body obnoxious to pestilential distempers. CHAP. X. DIRECTIONS IN A PESTILENCE.