OF THE COMMON EVACUATIONS. (,?

evacuations, and numberless other causes, are sufficient to mducea change either in the quantity or appearance of the urine. Any onewho attends to this will be astonished at the impudence of thosedaring quacks, who pretend to find out diseases, and prescribe topatients from the bare inspection of their urine. These impostors,however, are very common all over Britain, and by the amazingsredulity of the populace, many of them have amassed considerablefortunes.

As a free discharge of urine not only prevents but actually curesmany diseases, it ought by all means to be promoted; and every thingthat may obstruct it should be carefully avoided. Both the secretionand discharge of urine are lessened by a sedentary life, sleeping onbeds that are too soft and warm, food of a dry and heating quality,liquors which are astringent and heating, as red port, claret, and suchlike. Those who have reason to suspect that their urine is in toosmall quantity, or who have any symptoms of the gravel, ought notonly to avoid these things, but whatever else they find has a tendencyto lessen the quantity of their urine

When the urine is too long retained, it is not only resorbed, ortaken up again into the mass of fluids, but by stagnating in the blad-der it becomes thicker, the more watery parts flying off first, and themore gross and earthy remaining behind. By the constant tendencywhich these have to concrete, the formation of stones and gravel inthe bladder is promoted. Hence it comes to pass that indolent andsedentary people are much more liable to these diseases, than per-sons of a more active life.

Many persons have lost their lives, and others have brought onvery tedious and even incurable disorders by retaining their urine toolong, from a false delicacy. When the bladder has been over-distended,it often loses its power of action altogether, or becomes paralytic, bvwhich means it is rendered unable either to retain the urine, or expelit properly. The calls of nature ought never to be postponed.Delicacy is doubtless a virtue, but that never can be reckoned truedelicacy which induces any one to risk his health or hazard his life.

But the urine may be in too great as well as too small a quantity.This may be occasioned by drinking large quantities of weak watery-iquors, by the excessive use of arkaline salts, or any tiling that stimu-lates the kidnies, dilutes the blood, &c. This disorder very soonweakens the body, and induces a consumption. It is difficult tocure, but may be mitigated by strengthening diet and astringentmedicines, such as are recommended under the article Diabetes, ofexcessive discharge of urine.

OF THE PERSPIRATION.

Inseusn.le perspiration is generally reckoned the g"*****^discharges from the human body. It is of so great ""I*"™?* *health, that few diseases attack us while it goes properly on,when it is obstructed, the whole frame is soon disordered. |"charge, however, being less perceptable thaB any ot the rest, is .quently lew attended to. Hence it U. that acute fevers, rheumatisms,