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always lived in it, he was at last attacked a second time, and died.

Having treated of the appearance and fymptoms of this horrid infection, Dr. Mackenzie proceeds to throw out some philofophical reflections on its rife and progress in those countries which are fo unhappy as to be very liable to it.

The Plague, says he, is now more frequent in the Levant, than it was, when I came first into this country, about 30 years ago; for then, they were almost strangers to it in Aleppo and in Tripoli of Syria, and they had it but seldom at Smyrna; whereas now they have it frequently at Aleppo, and summer and winter in Smyrna, though never so violently in the winter; which must be owing to the great communication by commerce over all the Levant, and more exterded into the country villages than it used to be. I take the Plague to be an infection communicated by contact from one body to another; that is, to a found body from an infected one, whose poisonous effluvia, subtile miasmata, and volatile steams, enter the cutaneous pores of sound persons within their reach, or mix with the air, which they draw in respiration, and so advancing by the vafa inhalantia, mix with the blood and animal Auids, in which, by their noxious and active qualities, they increase their motion and velocity, and in some days produce a fever; so that the nearer and the more frequent the contact is, the greater is the danger, as the noxious particles, exhaling from the infected perfon, must be more numerous, and confequently have greater force and activity in proportion to their distance.

• Some persons are of opinion, that the air must be infected, and that it is the principal cause of these plagues; whereas I presume, that the ambient air is not otherwise concerned, than as the vehicle, which conveys the venemous particles from one body into another, at least in such plagues as I have seen hitherto at Smyrna and Constantinople; allowing always, that the different constitution of the air contributes very much to propagate the Plague : for the hot air dilates and renders more volatile and active the venomous fteams, whereas cold air contracts and more tifies them. The person having the plague may be said to have a contagious and poisonous air in his room and about him, while at the same time the open air is free from any dangerous exhalations; so that I never was afraid to go into any large house, wherein a plaguy person lived, provided that he was confined to one room.'

Dr. Mackenzie goes on to describe the symptoms of the pestilential fever, and to give directions with respect to the method of cure; but as the present inhabitants of this part of the world are providentially so happy as to be never visited with it; we thall confine our extracts to the Doctor's philofophical and historical observations on the subject.

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· The Plague breaks out here and a when it is not poflible to trace whence it houses, which were infected, and not we fected person is removed, lodge some of ti in wool, cotton, hair, leather or skins, which, put in motion by the heat in Apr of their nidus, where they resided, and re action, as to enter into the cutaneous por comes within their reach, and so infect h the French palace, at Mr. Hubsch's and two or three years running. But Plague spread, and are never so fatal as such as co

• Many are of opinion, that the heat ki term it, which is owing to a foolish fu Greeks, who pretend, that it must cea being St. John's day, though they may happen every year; and the strongest Plagu in my time, anno 1736, was hotteft abou tinued with great violence till the latter en ic began to abate ; but was not entirely ove vember, when Te Deum was sung in the

This mistaken notion may be in some wrong sepse put upon Prosper Alpinus, Plague at Cairo begins to cease in the mon when the strong northerly winds (called winds) begin to blow, which make the than in the months of May, April, an Plague rages most; which he very justly i fuffocating heats and southerly winds, whi months in that country: and it is then t load rice, flax, and other goods and merc tinople receive the infection, and carry and, upon these goods being delivered to parts of the city, the plague breaks out at « Jence among the trading people of the Gree Jews; for I have observed, both here and Turks are commonly the last of the four ni fected; but when the Plague gets once amo most by it, because they take the least care their families are much more numerous.

· The plague, as well as all other epider rise, progress, itate, and declension, when virulence, and many of the fick recover. S Sporadically all the winter; and we hear fo Phanar, among the Greeks, among the Jen menians; and even among the Franks ; for that Pera was not clean all the winter 17

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Philofophical Transactions, for the 1:1:64

Philosophical Transactions, for the Tear 1764: 433
he villages upon the Bosphorus; but during the win-
* of any great consequence.'
'count of a remarkable Tide at Bristol. By Dr.

Tucker.
of this tide was its rising suddenly, foon

almost to bigh-water mark, where it hour: when it sunk almost instanta'rular: after which, it began to dow

till it rose to the height it was nstances attending this extraor

se of it (most probably some

it
, me was at last attacked a fecond time, a

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rogress in those countries wrich roceeds to throw our lone ph '010Trpearance and fymptoms of this horrid

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speriments in Electricity. By Upsal, in Sweden. «y and great advantages, which the .. reaped from the extensive communica-merce; we sometimes find one nation alcury behind-hand with respect to the scientifie

of another. This does not appear, indeed, to be aler the case with the learned in Sweden ; Mr. Bergman, vwever, after recapitulating the circumstances of some experiments, well known in France and England, closes his letter with the following questions and remark : ' Ullufne, in Anglia, fulminis ictus, virgis ferreis erectis, avertere conatus

eft? et quo fucceffu? In Pensylvania tentari mihi narratum eft. Certe fi prue denter inftituatur, nulla hinc mala metuenda video.'-If our experimentalists cannot make a satisfactory answer to the above questions, they must admit that they are as far behind those of New England and Pensylvania, as the philosophers of Sweden are to those of Great Britain: Art. 14. An Account of a Fish from Batavia, called Jaculator. By

Dr. Schloffer. Our good friend, Dr. Schloffer of Amsterdam, hath, it seems, presented the Royal Society with a very uncommon fish; of which this article contains the drawing and description. The most extraordinary circumstance relating to it, is the manner of its obtaining food; which is pretty singular ; indeed so singular, that, if a personal acquaintance with this ingenious gentleman did not give us sufficient reason to think, that he could not mean to impofe on others, nor is liable to be eafily imposed on himself, we should hardly have been soon induced to give it credit. The Doctor having received from Mr. Hommel, governor of the hospital at Batavia, many uncommon fishes, well preserved, amongst them was this, called the Jaculator, or Shooting-fish; of which the governor gave him the following 2ccount :

It frequents the shores and fides search of food. When it fpies a fly fiti grow in shallow water, it swims on to t or fix feet, and then, with a surprising of its tubular-mouth a fingle drop of w ftriking the fly into the sea, where it fooi

- The relation of this uncommon acti raised the governor's curiofity; though it he was determined, if poffible, to be cons ocular demonftration.

For that purpose, he ordered a large with sea-water; then had some of these into it, which was changed every other di feemed reconciled to their confinement; try the experiment.

• A flender stick, with a fly pinned on a in fuch a direction, on the fide of the vefi Strike it.

• It was with inexpressible delight, that fish exercising their skill in /hooting at the 1 velocity, and never missed the mark.' Art. 15. An Account of the Polish Cochinea.

Warsaw. On this subject here are two papers, the other in English. They contain the descr which Dr. Wolfe fuppofes may be found in in Poland. The naturalists may lock for i June about the roots of the potentilla, fragari minus, Art. 21. An Account of the Degree of Cold ebler

By John Howard, Eja By this paper we learn, that at Cardingto on the 22d of November 1763, Fahrenheit's lo low as to and {. But as no concomitant mentioned, we are apprehenfive this fingular throw no great light on the locality of cold, fessed motive for the communication of this in intelligence to the Royal Society. Art. 23. A Catalgue of the Fifty Plants from Ch

sented by the Company of Apothecaries, for the Art. 34. An Account of several Fiery Meteors fee

rica. "By Profesor Winthrop. Prefixed to the account of these meteors, thrown out some ingenious hints relative to th meteors in general; with a view to the formatic tisfactory theory of their motion than we at prese

1

Art. 36. An Account of the Effeets of Lightening at South Weald in

Effex. By Dr. Heberden. A relation of the damage done to the church of South-Weald, a village in Eflex, on June 18, 1764, much about the time of the like misfortune happening to St. Bride's steeple, and in Essexftreet, London. Dr. Heberden closes his account with observing, that the whole appearance of the damage done to this church very much favours the conjecture of that fagacious oberver of nature Dr. Franklin, who thinks it probable, that, by means of metallic rods or wires reaching from the roofs to the ground, any buildings may be secured from the terrible effects of lightening Art. 40. Obfervations upon the Effelts of Lightening, with an Al

count of the Apparatus proposed to prevent its Mischiefs to Builda ings, more particularly to Powder Magazines. By Dr. IVatson.

Dr. Watson bath here described, at large, and in a very latif-
factory manner, the apparatus necessary to prevent the mischiefs
to be apprehended by lightening; but, having mentioned several
particulars of this kind in a former Review, we must refer those
of our Readers who are defirous of farther information on this
fubject, to the article itself.
Art. 41. An Account of the Effects of Lightening in St. Bride's

Church, Fleetstreet, in the 18th of June 1764. By Edward
Delaval, Esq;

The ingenious author of this paper hath been very accurate
and particular in his description of the damaged parts of this
building; humanely judging it would be of use, by describing
the several circumstances of this accident, to thew more fully
the necessity of preventing the danger to which such buildings
are exposed.
Art. 42. A Letter from Dr. Lawrence to Dr. Haberden, concerning

the Effeans of Lightening in Essex-Street, on the 18th of June,

1764. • This accident hath been before mentioned, and differs little in circumstances from other accidents of the like kind. Art. 44. A Letter to the Marquiss of Rockingham, with some Ob

servations on the Effects of Lightening:
This paper contains some very sensible remarks, by the inge-
nious Mr. Wilson; well worth attending to, by those who
would take such precautions, as the providential discoveries of
science have put into our hands, to secure their persons and pro-
perty from the melancholy effects of such awful dispensations,
as are frequently the disasters attending on thunder and light-
ening.
Art. 47. Experiments and Observations on the Compreffibility of

Fluids. By John Canton, M. A. F. R. S..
In speaking of the accounts heretofore given by Mr. Canton,

to

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