Anselmus de Boot, physician to Emperor Rudolph II, and one of the great authorities at the beginning of the seventeenth century, gave the following directions for making “aqua perlata, which is most excellent for restoring the strength and almost for resuscitating the dead. Dissolve the pearls in strong vinegar, or better in lemon juice, or in spirits of vitriol or sulphur, until they become liquified; fresh juice is then added and the first decanted. Then, to the milky and turbid solution, add enough sugar to sweeten it. If there be four ounces of this solution, add an ounce each of rose-water, of tincture of strawberries, of borage flowers and of balm and two ounces of cinnamon water. When you wish to give the medicine, shake the mixture so that the sediment may be swallowed at the same time. From one ounce to an ounce and a half may be taken, and nothing more excellent can be had. In pernicious and pestilential fevers, the ordinary aqua perlata cannot be compared to this. Care must be taken to cover the glass carefully while the pearls are dissolving, lest the essence should escape.”[[362]]

A curious book on the medicinal use of pearls was written in 1637 by Malachias Geiger,[[363]] in which he especially praises the efficacy of Bavarian pearls. It was true that their material value was less than that of oriental pearls, but this was compensated by their therapeutic qualities. He had accomplished many cures of a very serious disease and had used these pearls successfully in cases of epilepsy, insanity, and melancholia.

Quotations might be given from a hundred medieval writers as to the therapeutics of pearls. The diseases for which they were recommended, as noted by Robert Lovell’s “Panmineralogicon, or Summe of all Authors,” published at Oxford in 1661, seems to have included a large portion of the entire list known at that period. This summary states:

Pearls strengthen and confirme the heart; they cherish the spirits and principall parts of the body; being put into collyries, they cleanse weafts of the eyes, and dry up the water thereof, help their filth, and strengthen the nerves by which moisture floweth into them; they are very good against melancholick griefes; they helpe those that are subject to cardiack passions; they defend against pestilent diseases, and are mixed with cordiall remedies; they are good against the lienterie, that is, the flux of the belly, proceeding from the sliperiness of the intestines, insomuch that they cannot retaine the meat, but let it passe undigested; they are good against swounings; they help the trembling of the heart and giddinesse of the head; they are mixed with the Manus Christi against fainting (called Manus Christi perlata in the London Pharmacopaea); they are put into antidotes or corroborating powders; they help the flux of bloud; they stop the terms, and cleanse the teeth; they are put into antidotes for the bowels, and increase their vertue, make the bloud more thin, and clarify that which is more thick and feculent; they help feavers. The oile of Pearles or unions helpeth the resolution of the nerves, convulsion, decay of old age, phrensie, keepeth the body sound, and recovereth it when out of order, it rectifieth womens milk, and increaseth it, corrects the vices of the natural parts and seed. It cureth absesses, eating ulcers, the cancer and hemorrhoides.... The best are an excellent cordial, by which the oppressed balsame of life and decayed strength are recreated and strengthened, therefore they resist poyson, the plague, and putrefaction, and exhilarate, and therefore they are used as the last remedie in sick persons.[[364]]

RUSSIAN EIKON OF THE MADONNA
Ornamented with pearls

So powerful and mysterious were their alleged virtues, that in some instances it was necessary only that the pearls be worn to make effective their prophylaxis against disease. This belief was by no means confined to the ignorant and inexperienced, for we are told that even Pope Adrian was never without his amulet made of the extraordinary combination of oriental pearls, a dried toad, etc.[[365]] Leonardo, in the fifteenth century, wrote that pearls render true and virtuous all who wear them.[[366]] Although we wonder at what we call the superstitions of the Middle Ages, perchance future generations will smile at many of our mistaken follies.

A prominent historical instance of administering pearls medicinally was in the treatment of Charles VI of France (1368–1422), to whom pearl powder mixed with distilled water was given for the cure of insanity.

A far more illustrious patient was Lorenzo de’ Medici, “The Magnificent” (1448–1492), the celebrated ruler of Florence. When this plebeian prince lay dying of a fever at Careggi, just after that famous interview with Savonarola, his friends called in Lazaro da Ticino, a physician of reputation, who administered pulverized pearls. Politian, who was present, is credited with the statement that when the medicine was administered, to the inquiry as to how it tasted, Lorenzo replied: “As pleasant as anything can be to a dying man.”[[367]]

Even the English philosopher, Francis Bacon (1561–1626), mentioned pearls among medicines for the prolongation of life. He adds: “Pearls are taken, either in a fine powder or in a kind of paste or solution made by the juice of very sour and fresh lemons. Sometimes they are given in aromatic confections, sometimes in a fluid form. Pearls no doubt have some affinity with the shells wherein they grow; perhaps may have nearly the same qualities as the shells of crawfish.”[[368]]