This, properly made use of, is an excellent means to preserve and restore health. Children are fond of it; and those that make most use of it, have sounder constitutions than those that fit moping at home. Walking is the best exer-cise to preserve health before it is loft, or when it has been retrieved; but riding on horseback is most proper to regain it. Riding in a coach agrees best with the very infirm, as well as young children. That exercise is best which is used on an empty stomach, at least after breakfast; and should never be continued to weariness: and then it increases the circulation of the blood, attenuates and divides the fluids, promotes perspi-ration and a due secretion of the humours, srengthens the parts, creates an appetite, and helps digestions; wherefore those that use exercise are generally very robust, and seldom subject: to diseases. But immoderate exercise dissipates the spirits, weakens the body, destroys the elasticity of the fibres, and exhausts the fluid parts of the blood.

The lungs are fortified by loud talking, and walking up an easy ascent: riding helps digestion, strengthens the nerves, and cures several kinds of head-achs. Riding in a coach over the stones, is good for the gravel in the kidneys, and will make small stones to pass downwards, that slick in the ureters. Playing at tennis, billiards, bowls, etc. till a sweat is promoted, is good for rheumatick pains. Those that have feeble arm?, should play at shuttle-cock or tennis, and any such like game. Those that have weak hams, should kick a soot-ball, and the gouty may recover the use of their limbs by walking in rough roads, but the fits will be longest prevented by riding on horse-back, or in a coach: those that are obliged to lead seden-tary live should, if possible, walk an hour before dinner, and as much before supper.

Cold-bathing is a kind of exercise, and is very advantageous to health; but should never be made use of by those that have weak lungs, or that are under the fit of a chronical distemper, with a quick pulse, or the head ach. The flesh-brush is a most useful exercise, as is very evident from the effect it has upon horses; for this by warming the parts distributes the nourishment into every part of the body: likewise rubbing every part of the body with rough cloths or coarse flannel, has not only been sound to preserve health, but to contribute to the cure of several diseases.

Expectorants, are such things as promote the excretion of pituitous matter from the lungs. In the choice of these, it must be observed, that when the humour is thin and the pas-sages straight, then emollients are best, liquorice, saffron, sperma ceti, mallows, wild poppies, cream, oil of sweet-al-monds, diacodium, and hartshorn gelly. When a plenty of thick matter stuffs the lungs, then resolvents are necessary, as male speedwel, hyssop, scordium, diuretic salt, and stibiated nitre: likewise things that stimulate the nervous coats to excretion, cretion, such as gum ammoniac and its tincture, myrrh, benjamin, elecampane-root, florentine-orice, precipitated sulphur, and balsam of sulphur: when a greater spur is. wanting, as in the pituitous asthma and suffocating catarrh, then oxymel of squills will be of great service.

We must observe in the use of expectorants, that when a cough proceeds from a thin sharp matter, we ought to use no stimulating medicines before it is temperated; nor on the contrary, we should not prescribe emollients and relaxing things when the matter is concocted and prepared. In a moist chronic cough and pituitous asthma, when the lungs are fluffed with phlegm, lambatives, syrups and oils tend to weaken the sto-mach, destroy the appetite, digestion and chylisication, which will occasion a greater quantity of phlegm, which brings on a cachexy or the oedematous swellings of the dropsy. In this cafe it will be best to order balsamic-pectorals, Friar's balsam, tincture of myrrh, balsam of sulphur, or anisated balsam of sulphur.

In a disposition to a consumption or spitting of blood, in a dry cough, in straitness or difficulty of breathing, in a com-pressing pain of the breast, which arise rather from a con-gestion of blood, than from any thing that wants to be brought up, we must neither mollfy nor stimulate, for the disorder will be increased by such a practice. In acute diseases of the breast, such as the pleurify and inflammation of the lungs, expectorants must be cautiously used, especially in the beginning, for fear of increasing the inflammatory state of the blood : but when the disease is declining, then they will be proper to promote the ejection of thick concocted matter from the lungs.