head and face are too much exposed to cold, which these animals avoid, whilst the other parts are warmer, and confequently better adapted to the nature of the Crinones.

As to their origin, they do not spring from putrefaction, nor am I acquainted with the cause of their production, no more than I can determine into what they degenerate in the end. They rarely affect any but very young, and well nourished children, whose humours are copious and balsamic.

SYMPTOMS. Restlessnefs, agitation, and watchings, are caused by these animals, probably because they irritate the patients, who likewise become very thin and lean, either for want of rest, or through the confumption of the nourishment by these infects; and in confequence of this, a flow fever and rickets frequently fupervene.

DIAGNOSTICS. This diforder, if not manifest of itself, will become fo, by expofing the infant's back to the fire, or rub-` bing it with honey, milk, &c. It is uncommon in Paris, and in countries moderately cold, but frequent in fuch as are hot.

PROGNOSTICS. The Crinones are no way dangerous of themselves; they are alfo eafily

F

eafily cured, and commonly disappear in process of time.

- CURE. Among the medicines employed in the treatment of this disorder, topics are the most confiderable: yet the general remedies fhould be always premifed, especially if the patient be fat, plethoric, or full of crudities. In which cafe, let him be purg ed with compound fyrup of Rhubarb, or if he be too young, tender and unable to bear the immediate action of the cathartic, let it be given to his nurse, whofe breast-milk will fufficiently purge the infant. After wards let him take this abforbent powder.

R Ocul. cancr. & corrall. rubr. pp. kinekin. ¡aa. p. œ. m. f. pulv.

Take of crabbs-eyes, prepared red corall, and peruvian bark, of each equal quan-tities; reduce to a powderho Taking at the fame, time pullet broths, wherein are boiled cooling plants..

As to the topical remedies, they are easily, prepared. To make the hairs or infects appear more perceptible, let the infant's back

be

be exposed to the fire, or a friction made with milk or honey. When the infects manifeftly appear, let them be rubbed hard with a warm linen cloth, and most of them will be extracted thereby. They may then be obferved by the help of a microscope on the cloth; though by the friction, fome of them have been mangled. This method is commonly fufficient to deftroy these infects; yet fome have invented another, which they borrow from the manner of extracting the hairs or briftles of fwine, viz. by rubbing the fkin very hard with a double linen cloth, in whofe folds are included fome hot afhes. Some fhave of these hairs, but the heads of thefe animals ftill remain implanted in the glands, and the operation is troublefome to the infant; fo that the Firft method is preferable. If the infects ftill refift all your efforts, employ the fpecific remedy, viz. a decoction of ftaves-acre, or sharp pointed, or common dock, or a little mercurial ointment; or, finally, the skin employed by Goldsmiths to burnish their gold and filver work, for they commonly add a Tmall quantity of mercury to it.

You are to obferve, that fome authors

through a mistake, call these infects Cridones; wherefore, in fuch writings, if

you

find any

chapters of the Cridones, you are to underftand them of the Crinones.

CHAP. VI.

1

Of the HYDROA, or SUDAMINA.

HE Greek writers call this diforder

TH

dgos, which fignifies Sudor; the Latins call it Sudamina, for the fame reason. It confifts in a prodigious number of small or miliary pimples, which fucceed confiderable heat and fweating. They are very red, inflammatory, and pruriginous, till the heat begins to decline; and at length they dif appear without leaving any marks, only in those who have a very tender, delicate fkin, the cuticula fcales off like meal.

CAUSES. As the feat of the Hydroa is in the fudorific glands, it fprings very probably from the redundance or acrimony of that humour. The latter irritates and in

flames

flames the glands, the former diftends and obftructs them. Their red colour and inflamation is owing to the ftagnation of the blood. Their itching proceeds from the irritation or diftention of their nervous fibres. The tumours also preserve the conic figure of the glands. As to the fymptoms they are few; the fkin is hot, dry, farinaceous, and itching; whence the patient is restless, fubject to watching, and fometimes to a flight fever. The Diagnostics are eafy; for by infpection, and a little examination, the existence of the disorder is learned. As to the Prognoftics, the Hydroa is no way danger

ous.

CURE. Let the patient be lightly covered and his cloths frequently changed; let him also be kept in a cool place, and lye in clean linen in the afternoon, or during the heat; thus the tumours will vanish at laft by the change of the season: but if they be too obftinate, order a decoction of marth-mallows and milk. If they degenerate into a fort of impetigo, order Galen's Cerat, which is made of wax and the oil of fweet-almonds, boiled to a proper confiftence. You may add a little vinegar, or frog-fpawn water,