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at distance at the time。 A friar； returning from the East； brought the recipe to Europe somewhat before the middle of the seventeenth century。 The Grand Duke of Florence； in which city the friar was residing； heard of his cures； and tried； but without success； to obtain his secret。 Sir Kenehn Digby； an Englishman well known to fame； was fortunate enough to do him a favor； which wrought upon his feelings and induced him to impart to his benefactor the composition of his extraordinary Powder。 This English knight was at different periods of his life an admiral； a theologian； a critic； a metaphysician； a politician； and a disciple of Alchemy。 As is not unfrequent with versatile and inflammable people； he caught fire at the first spark of a new medical discovery； and no sooner got home to England than he began to spread the conflagration。
An opportunity soon offered itself to try the powers of the famous powder。 Mr。 J。 Howell； having been wounded in endeavoring to part two of his friends who were fighting a duel； submitted himself to a trial of the Sympathetic Powder。 Four days after he received his wounds； Sir Kenehn dipped one of Mr。 Howell's gaiters in a solution of the Powder； and immediately； it is said； the wounds； which were very painful； grew easy； although the patient； who was conversing in a corner of the chamber； had not； the least idea of what was doing with his garter。 He then returned home； leaving his garter in the hands of Sir Kenelm； who had hung it up to dry； when Mr。 Howell sent his servant in a great hurry to tell him that his wounds were paining him horribly； the garter was therefore replaced in the solution of the Powder； and the patient got well after five or six days of its continued immersion。〃
King James First； his son Charles the First； the Duke of Buckingham； then prime minister； and all the principal personages of the time； were cognizant of this fact； and James himself； being curious to know the secret of this remedy； asked it of Sir Kenelm； who revealed it to him； and his Majesty had the opportunity of making several trials of its efficacy； which all succeeded in a surprising manner。〃 ＇Dict。 des Sciences Medieales。＇
The king's physician； Dr。 Mayerne； was made master of the secret； which he carried to France and communicated to the Duke of Mayenne； who performed many cures by means of it； and taught it to his surgeon； who； after the Duke's death； sold it to many distinguished persons； by whose agency it soon ceased to be a secret。 What was this wonderful substance which so astonished kings； princes； dukes； knights； and doctors？ Nothing but powdered blue vitriol。 But it was made to undergo several processes that conferred on it extraordinary virtues。 Twice or thrice it was to be dissolved； filtered； and crystallized。 The crystals were to be laid in the sun during the months of June； July； and August； taking care to turn them carefully that all should be exposed。 Then they were to be powdered； triturated； and again exposed to the sun； again reduced to a very fine powder； and secured in a vessel； while hot； from the sunshine。 If there seem anything remarkable in the fact of such astonishing properties being developed by this process； it must be from our short…sightedness； for common salt and charcoal develop powers quite as marvellous after a certain number of thumps； stirs； and shakes； from the hands of modern workers of miracles。 In fact the Unguentum Armarium and Sympathetic Powder resemble some more recent prescriptions； the latter consisting in an infinite dilution of the common dose in which remedies are given； and the two former in an infinite dilution of the common distance at which they are applied。
Whether philosophers； and more especially metaphysicians； have any peculiar tendency to dabble in drugs and dose themselves with physic； is a question which might suggest itself to the reader of their biographies。
When Bishop Berkeley visited the illustrious Malebranche at Paris； he found him in his cell； cooking in a small pipkin a medicine for an inflammation of the lungs； from which he was suffering； and the disease； being unfortunately aggravated by the vehemence of their discussion； or the contents of the pipkin； carried him off in the course of a few days。 Berkeley himself afforded a remarkable illustration of a truth which has long been known to the members of one of the learned professions； namely； that no amount of talent； or of acquirements in other departments； can rescue from lamentable folly those who； without something of the requisite preparation； undertake to experiment with nostrums upon themselves and their neighbors。 The exalted character of Berkeley is thus drawn by Sir James Mackintosh： Ancient learning； exact science； polished society； modern literature； and the fine arts； contributed to adorn and enrich the mind of this accomplished man。 All his contemporaries agreed with the satirist in ascribing
〃'To Berkeley every virtue under heaven。'
〃Even the discerning； fastidious； and turbulent Atterbury said； after an interview with him； 'So much understanding； so much knowledge； so much innocence； and such humility； I did not think had been the portion of any but angels； till I saw this gentleman。'〃
But among the writings of this great and good man is an Essay of the most curious character； illustrating his weakness upon the point in question； and entitled； 〃Siris； a Chain of Philosophical Reflections and Inquiries concerning the Virtues of TAR WATER； and divers other Subjects；〃an essay which begins with a recipe for his favorite fluid； and slides by gentle gradations into an examination of the sublimest doctrines of Plato。 To show how far a man of honesty and benevolence； and with a mind of singular acuteness and depth； may be run away with by a favorite notion on a subject which his habits and education do not fit him to investigate； I shall give a short account of this Essay； merely stating that as all the supposed virtues of Tar Water； made public in successive editions of his treatise by so illustrious an author； have not saved it from neglect and disgrace； it may be fairly assumed that they were mainly imaginary。
The bishop； as is usual in such cases； speaks of himself as indispensably obliged； by the duty he owes to mankind； to make his experience public。 Now this was by no means evident； nor does it follow in general； that because a man has formed a favorable opinion of a person or a thing he has not the proper means of thoroughly understanding； he shall be bound to print it； and thus give currency to his impressions； which may be erroneous； and therefore injurious。 He would have done much better to have laid his impressions before some experienced physicians and surgeons； such as Dr。 Mead and Mr。 Cheselden； to have asked them to try his experiment over again； and have been guided by their answers。 But the good bishop got excited； he pleased himself with the thought that he had discovered a great panacea； and having once tasted the bewitching cup of self…quackery； like many before and since his time； he was so infatuated with the draught that he would insist on pouring it down the throats of his neighbors and all mankind。
The precious fluid was made by stirring a gallon of water with a quart of tar； leaving it forty…eight hours； and pouring off the clear water。 Such was the specific which the great metaphysician recommended for averting and curing all manner of diseases。 It was； if he might be believed； a preventive of the small…pox； and of great use in the course of the disease。 It was a cure for impurities of the blood； coughs； pleurisy； peripneumony； erysipelas； asthma； indigestion； carchexia； hysterics； dropsy； mortification； scurvy； and hypochondria。 It was of great use in gout and fevers； and was an excellent preservative of the teeth and gums； answered all the purpose of Elixir Proprietatis； Stoughton's drops； diet drinks； and mineral waters； was particularly to be recommended to sea…faring persons； ladies； and men of studious and sedentary lives； could never be taken too long； but； on the contrary； produced advantages which sometimes did not begin to show themselves for two or three months。
〃From my representing Tar