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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 least painful, but, on the contrary, agreeable ; and if I return to bed afterwards, before I dress myself, as 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 no ill consequences whatever resulting from it, and that at least it does not injure my health, if it does not in fact contribute much to its preservation. I shall therefore call it for the future a bracing or tonic bath.
March 10, 1973 I shall not attempt to explain why damp clothes occafion colds, rather than wet ones, because doubt the fact : I imagine that neither the one nor the other contribute to tbis effect, and that the causes of colds are totally independent of wet and even of cold. I propose writing a short paper on this subject, the first leisure moment I have at my disposal. In the mean time I can only fay, that having some fufpicions that the common notion, which attributes to cold the property of stopping the pores and obstructing perfpiration, was ill. founded, I engaged a young physician, who is making fome experiments with Sanctorius's balance, to estimate the different proportions of his perfpiration, when remaining one hour quite naked,
and another warmly clothed. He pursued the experiment in this alternare manner for eight hours successively, and found his perfpiration almost double during those hours in which he was naked,
OBSERVATIONS ON THE GENERALLY PREVAILING DOC
TRINES OF LIFE AND DEATH,
TO THE SAME.
OUR obfervations on the causes of death,
and the experiments which you propose for iccalling to life tliole who appear to be kiled by lightning, demonstrate equally your sagacity and humanity. It appears that the doctrines of life and death, in general, are yet but little underflood.
A coad, buried in fand, will live, it is said, until the sand becomes petrified ; and then, being inclosed in the stone, it may till live for we know pot how many ages. The facts which are cired in fupport of this opinion, are ioo numerous and too circumstantial nut to defeive a certain degree of crédit. As we are accustomed to see all the animals with which we are acquainted cat and drink, it appears to us difficult to conceive 'how à toad can be supported in such a dungeon. But if we reflect, ihat the neceffity of nourishment, which animals experience in their ordinary ftate, proceeds froin the c inunual waste of their substance by perfpiration : it will appear less incredible that lome animals in a torpid Itate, perfpiring less because they use no exercise, should have less need of ali.
wlich are covered wiih scales or thells, which ftop perspiration, such as land and fea' turtles, serpents, and some fpecies of Sith, should be able to subgit a considerable time without any nourishment whatever. A plant, with its flowers, fades and dies immediately, if exposed to the air without having its roots immersed in a humid soil, froin which it may draw a sufficient quantity of moitlure, to supply that which exhales from its sub Rance, and is carried off continally by the air. Perhaps, however, if it were buried in quickfilver, it might preserve, for a confiderable space of tiine, its vegetable life, its fiell and colour. If this be the case, it might prove a commodious method of transporting from diftane conintries those delicate plants which are unable to suftain the inclemency of the weather at sea, and which require particular care and attention.
I have seen an instance of common flies preserv. ed in a inanner fomewhat fimilar. They had been drowned in Madeira wine, apparently about the time when it was bottled in Virginia, to be sent 10 London. At the opening of one of the bottles, at the house of a friend where I was, three drowned flies fell into the firit glass which was filled. Having heard it remarked that drowned flies w re capable of being revived by the rays of the fun, I propofed making the experiment upon thefe. They were therefore exposed to the sun, upon al fieve, which had been employed to train them. out of the wine. In less than three hours two of them began by degrees to recover life. They comincuced by fome convulsive motions in the thighs, and at length they raised themselves upon their legs, wiped their eyes with their fore feet, beat and brushed their wings with their hind feet, and soon after began to fly, finding themselves in Old England, without knowing how they cane thither. The third continued lifeless until funfet,
when, losing all hopes of him, he was thrown away,
I wish it were posible, from this instance, to invent a method of embalming drowned persons, in fuch a manner that they might be recalled to life at any period, however distant; for having a yery 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 calk 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, fince, in all probability, we live in an age too early, and too near the infancy of science, to see such an art brought in our time to its perfe&ion, I must, for the present, content myself with the treat, which you are so kind, as to promise me, of che resurrec. Hon of a fowl or a turkey-cock.
PRECAUTIONS to be used by those who are about to
underiuke a SEA VOYAGE.
THEN you intend to take a long voyage,
nothing is better than to keep it a secret till the moment of your departure. Without this, you will be continually interrupted and torinenced by visits from friends and acquaintances, who not only make
your 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 much uneasiness; affairs which you have not terminated, accounts which you have not settled, and a number of things which you propofed to carry with you, and which you
find the want of every moment. Would it not be attended with the best consequences, to reforin such a custom; and suffer a traveller, without deranging him, to make his preparations in quietness, to set apart a few days, when these are fivilhed, 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 captain; though great part of the pleasure and happiness of the passage depends upon this choice, and thor one inust for a time be confined to his company, and be in fome measure under his command. If he is a social sensible man, obliging, and of a good disposition, you will be so much the happier. One sometimes meets with people of this description, but they are not common ; however, if
yours be not of this number, if he be a good seaman, attentive, careful, and active in the management of his vehel, you may disperse with the Teit, for these are the most eflential 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 have some private store, which you may make use of occafionally. You ought, therefore, to provide good water, that of the ihip being often bad; but you must put it into bottles, without whic! you cannot expect to preserve it sweet. You oughe also to carry' with you good tea, ground collet, chocolate, wine of the fort you like beft, cyder, Aried raisins, almonds, fugar, capillaire, citrons, um, eggs dipped in oil, portable soup, bread twice