A Discourse on the Plague, Richard Mead [microsoft ebook reader .TXT] 📗

Fellow of the College of Physicians, and of the Royal Society; and Physician to his Majesty.

The Ninth Edition corrected and enlarged.

LONDON,

Printed for A. Millar, against Catharine-Street, in the Strand:
And J. Brindley in New-Bond-Street.
MDCCXLIV.

TO THE
Right Honourable
James Craggs, Esq;

ONE OF
His Majesty’s Principal Secretaries
of State.

SIR,

I Most humbly offer to You my Thoughts concerning the Prevention of the Plague, which I have put together by your Command. As soon as you were pleased to signify to me, in his Majesty’s Absence, that their Excellencies the Lords Justices thought it necessary for the publick Safety, upon the Account of the Sickness now in France, that proper Directions should be drawn up to defend our selves from such a Calamity; I most readily undertook the Task, though upon short Warning, and with little Leisure: I have therefore rather put down the principal Heads of Caution, than a Set of Directions in Form.

The first, which relate to the performing Quarantaines, &c. You, who are perfectly versed in the History of Europe, will see are agreeable to what is practised in other Countries, with some new Regulations. The next, concerning the suppressing Infection here, are very different from the Methods taken in former Times among Us, and from what they commonly do Abroad: But, I persuade my self, will be found agreeable to Reason.

I most heartily wish, that the wise Measures, the Government has already taken, and will continue to take, with Regard to the former of these, may make the Rules about the latter unnecessary. However, it is fit, we should be always provided with proper Means of Defence against so terrible an Enemy.

May this short Essay be received as one Instance, among many others, of the Care, you always shew for Your Country; and as a Testimony of the great Esteem and Respect, with which I have the Honour to be,

SIR,
Your most obedient, and
Most humble Servant,
R. Mead.
Nov. 25.
1720.

This Book having at first been written only as a Plan of Directions for preserving our Country from the Plague[1] was then very short and concise. An Act of Parliament being immediately after made for performing Quarantaines &c. according to the Rules here laid down, it passed through seven Editions in one year without any Alterations. I then thought proper to make some Additions to it, in order to shew the Reasonableness of the Methods prescribed, by giving a more full Description of this Disease, and collecting some Examples of the good Success which had attended such Measures, when they had been put in Practice. At the same time I annex’d a short Chapter relating to the Cure of the Plague; being induced thereto by considering how widely most Authors have erred in prescribing a Heap of useless and very often hurtful Medicines, which they recommend under the specious Titles of Antidotes, Specifics and Alexipharmacs: hoping that the great Resemblance, which I had observed between this Disease and the Small Pox, would justify my writing upon a Distemper which I have never seen.

INDEED the Small Pox is a true Plague, tho’ of a particular kind, bred, as I have shewn all Pestilences are, in the same hot Egyptian Climate, and brought into Asia and Europe by the way of Commerce; but most remarkably by the War with the Saracens, called the Holy War, at the latter end of the eleventh and the beginning of the twelfth Century[2]. Ever since which time the morbific Seeds of it have been preserved in the infected Cloaths and the Furniture of Houses: and have broken out more or less in all Countries, according as the hot and moist Temperature of the Air has favoured their Spreading and the Exertion of their Force. The Measles is likewise a Plague sui generis, and owes its Origin to the same Country.

I have now revised my little Work once more: and though I cannot find any reason to change my Mind as to any material Points which regard either the Preventing or the Stopping the Progress of Infection; yet I have here and there added some new Strokes of Reasoning, and, as the Painters say, retouch’d the Ornaments, and hightened the Colouring of the Piece.

THE Substance of the long Preface to the last Edition is as follows.

I have insisted more at large upon the Infection of this Disease, than I could ever have thought needful at this time, after Europe has had Experience of the Distemper for so many Ages; had I not been surprized by the late Attempts of some Physicians in France to prove the contrary, even while they have the most undeniable Arguments against them before their Eyes. In particular, I cannot but very much admire to see Dr. Chicoyneau, and the other Physicians, who first gave us Observations on the Plague, when at Marseilles, relate in the Reflections, they afterwards published upon those Observations, the Case of a Man, who was seized with the Plague, upon his burying a young Woman dead of it, when no one else dared to approach the Body; and yet to see them ascribe his Disease, not to his being infected by the Woman, but solely to his Grief for the Loss of her, to whom he had made Love, and to a Diarrhœa, which had been some time upon him[3]. No question but these concurred to make his Disease the more violent; and perhaps even exposed him to contract the Infection: but why it should be supposed, that he was not infected, I cannot imagine, when there was so plain an Appearance of it. I am as much at a Loss to find any Colour of Reason for their denying Infection in another Case, they relate, of a young Lady seized with the Plague, upon the sudden Sight of a Pestilential Tumor, just broke out upon her Maid; not allowing any thing but the Lady’s Surprize to be the Cause of her Illness[4].

THE Truth is, these Physicians had engaged themselves in an Hypothesis, that the Plague was bred at Marseilles by a long Use of bad Aliment, and grew so fond of their Opinion, as not to be moved by the most convincing Evidence. And thus it mostly happens, when we indulge Conjectures instead of pursuing the true Course for making Discoveries in Nature.

I KNOW they imagine this their Sentiment to be abundantly confirmed from some Experiments made by Dr. Deidier[5] upon the Bile taken from Persons dead of the Plague: which having been either poured into a Wound made on purpose in different Dogs, or injected into their Veins, never failed, in many Trials, to produce in them all the Symptoms of the Pestilence, even the external ones of Bubo’s and Carbuncles. One Dog, upon which the Experiment succeeded, had been known, for three Months before, to devour greedily the corrupted Flesh of infected Persons, and Pledgets taken off from Pestilential Ulcers, without receiving any Injury. From hence they conclude[6] that this Disease is not communicated by Contagion, but originally bred in the Body by the Corruption of the Bile. This Corruption, they say, is the Effect of unwholsome Food; and the Bile thus corrupted produces a Thickness and a Degree of Coagulation in the Blood, which is the Cause of the Plague: Tho’ this they allow to be inforced by a bad Season of the Year, and the Terrors of Mind and Despair of the Inhabitants.

THESE Experiments are indeed curious, but fall very short of what they are brought to prove. The most that can be gathered from them is this: That Dogs do not, at least not so readily, receive Pestilential Infection from Men, as Men do from one another: And also, that the Bile is so highly corrupted in a Body infected with the Plague, that by putting it into the Blood of a Dog it will immediately breed the same Disease.

BUT it does not follow from hence, that the Bile is the Seat of the Disease, or that other Humors of the Body are not corrupted as well as this. I make no question but the whole Mass of Blood is, in this Case, in a State of Putrefaction; and consequently that all the Liquors derived from it partake of the Taint.

ACCORDINGLY it appeared afterwards from some Experiments made by Dr. Couzier[7], that not only the Blood, but even the Urine from an infected person, infused into the crural Vein of a Dog communicated the Plague. I will venture to affirm, that if, instead of Bile, Blood, or Urine, the Matter of the Ulcers had been put into a Wound made in the Dog; it would have had at least an equally pernicious Effect: As may well be concluded from the Inoculation of the Small Pox.

AS to the Dog’s eating the corrupted Flesh and purulent Matter of the Patients; it ought to have been considered that there are some Poisons very powerful when mixed immediately with the Blood, which will not operate in the Stomach at all: As in particular the Saliva of the mad Dog and the Venom of the Viper[8]. And therefore Dr. Deidier himself, some Months after his former Experiments, found that pestiferous Bile itself was swallowed by Dogs without any Harm[9].

THE right Inference to be made from these Experiments, I think, would have been this: That since the Blood and all the Humors are so greatly corrupted in the Plague, as that Dogs (tho’ not so liable to catch the Distemper in the ordinary way of Infection, as Men are) may receive it by a small Quantity of any of these from a diseased Subject being mixed with their Blood; it may well be supposed, that the Effluvia from an infected Person, drawn into the Body of one who is sound, may be pestiferous and productive of the like Disorder.

MY Assertion, that these French Physicians have before them the fullest Proofs of this Infection, not only