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fortunately made by accident, and in the following manner:

When I was a boy, I amused myself one day with flying a paper kite; and, approaching the back of a pond, which was rear a mile.broad, I tied the string to a stake, and the kite ascended to a very considera ble height above the pond, while I was swimming, In a little time, being desirous of amusing myself with iny kite, and enjoying at the same time the pleasure of swimming, I returned, and loosing from the stake the string with the little stick which was fastened to it, went again into the water, where I found, that, lying on my back, and holding the stick in my hands, I was drawn along the surface of the water in a very agrecable manner. Having then engaged another boy to sarry my clothes round the pond, to a place which I pointed out to him, on the other side, I began to cross the pond with my kite, which carried me quite over without the least fatigue, and with the greatest pleasure imaginable. I was only obliged occasionally to halt a little in my course, and resist its progress, when it appeared that, by following 100 quick, I lowered the kite too much; by doing which occasionally I made it rise again. I have never since that time practised this singular mode of swimming though I think it not impossible to cross in this man ner from Dover to Calais. The packet-boat, hov ever, is still preferrable.

NEW MODE OF BATHING.

EXTRACTS OF LETTERS TO M. DUBOURG.

London, July 28, 1768 I GREATLY approve the epithet which you give, in pour letter of the 8th of June, to the new method of treating the small-pox, which you call the tonico bracing method; I will take occasion, from it, to mention a practice to which I have accustomed my. self. You know the cold bath has long been in voglie nere as a tonic: but she shock of the cold water hath always appeared to me, generally speaking, as too violent, and I have found it much more agreeable to my constitution to bathe in another element-I mean cold air. With this view I rise early almost every morning, and sit in my chamber without any clothes whatever, half an hour or an hour, according to the season, either reading or writing. This practice is not in the l'ast painful, but on the contrary, agree able; and if I return to bed afterwards, before I dress myself, as it sometimes happens, I make a supplement to my night's rest of one or two hours of the most pleasing sleep that can be imagined. I find nu ill consequences whatever resulting from it, and that at least it does not injure my healih, if it does not in fact contribute to its preservation. I shall therefore call it a bracing, or tonic bath.

March 10, 1773. I SHALL not attempt to explain why damp clothes occasion colds, rather than wet ones, because I doubt the fact; I imagine that neither the one nor the other contribute to this effect, and that the causes of cold are totally independent of wet, and even of cold. I propose writing a short paper on this subject, the first moment of leisure I have at my dispo sal.' In the mean time, I can only say, that having some suspicions that the common notion, which attributes to culd the property of stojiping the pores and obstructing perspiration, was ill-founded, I engaged a young physician, who is making some experinients with Sanctorius's balance, to estimate the different proportions of his perspiration, when remaining one hour quite naked, and another warmly clothed.He pursued the experiment in this alternate man. per for eight hours successively, and found his per.

piration almost double during those hours in which ae was naked

ONSERVATIONS ON THE GENERALLY PRIVAILINA

DOCTRINES OF LIFE AND DEATH.

To the same. Your observations on the causes of death, and tas experiments which you propose for recalling to lifs those who appear to be killed by lightning demon. strate equally your sagacity and huinanity. It appears that the doctrines of life and death, in general, are yet but little understood.

A toad buried in the sand will live, it is said, un. til the sand becomes petrified; and then, being in. closed in the stone, it may live tor we know not hoiu many ages. The facts which are cited in support of this opinion, are too nunerous and too circumstantial not to deserve a certain degree of credit. As we are accustomed to see all the animals with which we are acquainted eat and drink, it appears to us difficult to conceive, how a toad can be supported in such a dun. geon. But if we reflect that the necessity of nourish. ment which animals experience in their ordinary state, proceeds from the continual waste of their substance by perspiration; it will apprar less incredible, that some aniinals, in a torpid state, perspiring less, because they use no exercise, should have less need of aliinent, and that others, which are covered with scales Or shells, which stop perspiration, such as land and sea turtles, serpents and some species of fish, should be able to subsist a considerable tine without any nourishment whatever. A plant, with its flowers, fades and dies jinmediately, if exposed to the air without having its roots immersed in a humid soil, from which it may draw a sufficient quantity on moisture to supply that which exhales from its subBlanco, and is ca:ried off continually by the air. Perhaps, however, if it were buried in quick-silver, it might preserve, for a considerable space of time, its vegetable life, its smell and colour. If this be the case, it might prove a commodious method of trans porting from distant countries those delicate plant which are unable to sustain the incleinency of the

immun, al sea, and which require particular care ang attention.

I have seen an instance of common fies preserved in a manner somewhat sinilar. They nad been drowned in Madeira yine, apparently about the time it was bottled in Virginia, to be sent to London. Al the opening of one of the bullies, at the house of a friend where I was, three drowned flies fell into the first glass that was filled. Having heard it remarked that drowned flies were capable of being revived by the rays of the sun, I proposed making the experi ment upon these. They were therefore exposed to, the sun,upon a sieve which had been employed to strain them out of the wine. In less than three hours, two of them by degrees began to recover life. They commenced by some convulsive motions in the thighs, and at length they raised themselves upon their legs, wiped their eyes with their fore feet, beat and brush ed their wings with their nind feet, and soon after began to fly, finding themselves in Old England, without knowing how they came thither. The third continued lifeless until sun-set, when, losing all hopes of him, he was thrown away.

I wish it were possible, from this instance, to invent a method of embalming drowned persons in such a manner, that they may be recalled to life at any period, however distant: for, having a very ardent desire to see and observe the state of America an hundred years hence, I should prefer to an ordinary death, the being immersed in a cask of Madeira wine, with a few friends, until that time, then to be recalled to life by the solar warmth of my dear country! But since, in all probabilicy, we live in an

ge too early, and too near the infancy of science, to ee such an art brought in our time to its perfection, I must, for the present, content myself with t'e treat, which you are so kind as to promise me, of the resu Kection of a fowl or a turkey-cock.

PRECAUTIONS.

!

TO BE USED BY THOSE WHO ARE ABOUT TO

- UNDERTAKE A SEA VOYAGE.

When you intend to take a long voyage, nothing 18 better than to keep it a secret till the inoment of your departure. Without this, you will be continually in errupted and tormented by visits from friends and cquaintances, who not only make you lose you. valuable time, but make you forget a thousand things which you wish to remember; so that when you are embarked and fairly at sea, you recollect, with muck uneasiness, affairs, which you have not terminated, accounts that you have not settled, and a number of things which you proposed to carry with you, and which you find the want of every moment. Would it not be attended with the best consequences to reform such a custom, and to suffer a traveller, without deranging him, to make his preparations in quietness, to set apart a few days, when these are finished, to take leave of his friends, and to receive their good wishes for his happy return.

It is not always in one's power to choose a cap. 'ain; though great part of the pleasure and happi. ness of the passage depends upon this choice, and though one must for a time be confined to his com. pany, and be in some ineasure under his coinmand. If he is a social scosible man, obliging and of a good disposition, you will be so much the happier. Ono sometimes meets with people of this description, but hey are not coinmon; however, if your's be not of his number, if he be a good seaman, attentive, care. mul, and active in the management of his vessel, you Qust dispense with the resi, for these are the most essential qualities.

Whatever right you may have by your agreement with him to the provisions he has taken on board for the use of the passengers, it is always proper to havo some private store, which you may make use of accasionally. You ought therefore to provide good wa ter, that of the ship being often had: but you mun

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