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caufes violent pain, if care is not taken to have it removed. For this purpofe, the Indians pafs, with the greatest circumfpection, a fharp pointed and fine needle, through the pores of the fkin, at the place where this enemy lies hid. Then they turn it in every direction round the tumour, in the midft of which he refides, that they may detach it from the reft of the body, and get it away with the animal himself. When this tumour is examined with a glafs, the infect is feen inclosed in a fort of transparent pearl. There are likewife obferved in it, two of three fmall red points, which are the extremities of arteries. Now, if the blood paffed into the veins, by the extremities of the arteries, it would follow, that these red points, fo diftinctly feparated, ought to unite, or at least to have fome communication with them. I do not deny all communication between the veins and arteries, but that fort only, which anatomists fuppofe to be made by anaftomofis. There is another kind, which is made by the ramifications of the arteries and veins, and this I admit.

Infects are likewife ufeful in the cure of difeafes. Experience teftifies, that they may be employed advantageoufly, not only for external wounds, but internal diforders. Phyficians dry thefe little animals in the air, or fome of their parts, reduce them to powder, and give them to their patients in a convenient vehicle, or made into the form of confection, or conferve. Some digeft them in oil, and make a balfam of them; others kill them in oil of olives, and ufe the oil. Some difiil them while recent, which extracts a water from them, and reduces the reft to afhes, from which laft is drawn, by means of the first water, a fixed falt. Different reafons may be given for the virtues contained in thefe little animals. One, that the falt they yield, is more pene trating, and more volatile than that of others; that

they

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they poffefs a natural oil, which produces good effects, and laftly, that they are endowed with a more efficacious fulphur.

I fhall not, I think, wander from my fubject, if I here mention those infects, that have hitherto been used in medicine. I begin with leeches, which, when applied externally, have the fame effect with cupping glaffes. The kind chofen for this operation is a fmall one, having its back marked with ftreaks, (Hirudo medicinalis.) They are not fo hurtful as the others. Before employing them, they must be kept fome time in pure water, to purge them. The place they are to be applied to must be previously rubbed with nitre, blood or clay. When they are to be removed, let them be fprinkled with a little falt or afhes. No external use is made of them, but for fucking the blood. In fevere head-aches, they are applied to the temples; for gentle evacuations, they are fixed on the arms or feet; they are likewise applied to the hæmorrhoids, to open thofe that are clofe. Sometimes they are made ufe of for obftructions, in female cafes.

Earth worms are said to produce excellent effects in medecine. They promote perfpiration, provoke urine, allay pain, foften, refolve, and diffipate conftipations, increase milk, and cure wounds. They are often used in cafes of apoplexy, in contractions of the limbs, and other accidents of the nerves and mufcles; in jaundice, dropfy and cholic, and particularly in rheumatifm. They are employed both internally and externally. When taken internally,

they are bruifed while fresh, mixed with wine, and ftrained through a cloth. Others dry them, and reduce them to powder. For external ufe, they are kept either alive, or after they are dead. Applica tions of living worms are good against the cramp or

worms

worms, when laid on the part affected. Dead worms are taken to affuage the pain, occafioned by a carious tooth, or the gout. In the firft cafe, the hollow of the spoilt tooth is filled with their powder; and in the laft, that powder is mixed with a quantity of meal, and applied to the part affected.

vers.

Of thofe infects which have feet without wings, fpiders are faid to be of great ufe in medicine. The great fpider, with the crofs, (Aranea diadema.) has been particularly recommended in intermitting feFor this purpofe, it is inclofed in a nut fhell, tied round the neck, or applied to the pulfe, which, it is faid, carries off the fever. Some perfons have advised as a cure for the ague, a fpider's web, mixed with the white of an egg and foot, which they apply to the pulfe. A fpider's web is advantageously used in hæmorrhages.

The Onifci are not lefs ufeful. Thefe infects affift digeftion, are a good attenuant and aperient; with these qualities, it is not furprifing that they fhould .` ferve to diffolve vifcidities, to open the vital organs in jaundice, gravel, retention of urine, and cholic; and to restore loft appetite, arifing from foulness of the ftomach. External applications are alfo made of then for difeafes of the eyes, pain of the ears, and inflammation of the throat. The powder of them is mixed with honey, and rubbed on the diseased part. They are applied living, for the cure of that fpecies of ulcer, called Phadagana, which eats like a

cancer.

The filk-worm alfo deferves a place here. After being dried, and reduced to powder, they are fprinkled on the crown of the head, to defend it against vertigos and convulfions. Their web or filk produces the fame effect; for, if velvet is reduced to powder,

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and given to thofe troubled with the falling fickness, they are relieved. The fmoke of filk fluffs burnt, is likewife of fervice to women fubject to difeafes of the matrix. The powder of burnt caterpillars, taken like tobacco, ftops bleeding at the nofe. Earwigs fortify the nerves, and are good against convulfions. They may be infufed in oil, and after being left there for fome time, they must be boiled, and laid upon the difeafed parts. The powder of this infect, mixed with the urine of a hare, and put into the ears, is good for deafness.

Those who have no repugnance at fwallowing lice, will find them a fpecific against the jaundice. But this remedy proved fatal in one inftance, to a youth, in whofe ftomach, when he was opened,a great quantity of this loathfome infect was found. Some ule them in agues; fwallowing four or five of them during the fit. It is certain, that these infects fuck the bad humours from the bodies of children. Scorpions,reduced to afhes by fire, and taken in powder, promote the difcharge of urine, retained by the gravel or stone." They furnifh likewife a remedy against their own bite. It is only neceffary to crufh them upon the wound, or to anoint the place with oil of almonds, in which these animals have been infufed. The tick burnt to powder, and spread on the head, makes the hair fall off. It cures the Eryfipelas and itch. Bugs burnt and taken in powder, expell the after-birth. If the head is anointed with oil, in which the fea polypus is boiled, the hair falls off.

Winged infects, with membranous wings, are also of various ufes in medecine. The powder of dried bees makes the hair grow, if the place they have fallen from is rubbed with it. Honey, on account of its balfamic quality, is agreeable to the breaft, to the lungs and reins. Wax, applied to wounds, cleanfes

them,

them, affuages the pain and cures them and this is the reason, why it is an ingredient in plaifters. It foftens corns on the feet, fo that they are easily taken out. For this end, it is mixed with turpentine, in which has been put a portion of bruifed verdigreafe; of this is made a plaifler to be applied to the corn.

Crickets are used to fortify weak fight, the liquid fubftance being expreffed and put into the eyes. They likewife foften the glands, when the fame fubftance is rubbed on them. Common flies are emollient, abftergent, and make the hair grow, when, after being bruifed, they are applied to the bald part. The water diftilled from them, is good againft difeafes of the eyes. When used, it must be made into a plaifter with the yolk of an egg. Galen approves this remedy. It likewife makes the hair to grow, removes freckles, and restores hearing. One perfon, fure that no purgative could have produced the effect, fwallowed four or five gnats, and was effectually purged. It is likewife faid, that the red gnats, taken in infufion, are an excellent remedy against the falling ficknefs. Oil from the aphides was much efteemed formerly. Wafps have the fame qualities as millepieds; that is, they provoke urine, and bring away gravel. The fpongy excrefcences, which are feen on wild rofes, are good against the gravel, but have that property, merely because they ferve as a neft to a species of ichneumon. If, like tobacco, one fmokes the neft of wafps, it will appease the pain of

the tooth-ach.

The other kind of infects with hard wing-cafes, are not lefs ufeful in medicine. The cochineal infects provoke urine, like the millepieds, becaufe like them, they contain a deal of volatile falt. The powder of this infect, mixed with fugar, is alfo useful against the cholic, the ftone, and the meafles. Flying

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