Mean time. 12h 17m 12 20 12 20 12 cloudy. 43 very light on the N. E. limb. 24 23 Grimaldus emerging. 28 43 center of Infula Ventorum. " 32 256 35 36 43 48 13 23 flight view of Copernicus emerging. laft of Tycho emerging. a right line from Injula Ventorum through Tycho will touch the moon very light. From the beginning of the eclipfe to the beginning of total darkness was Duration of total darkness From the end of total darknefs, to the end of the eclipfe O 58 59 Total duration 3 38 57 MEDICINE. TO THE EDITOR OF THE LONDON MAGAZINE. SIR, SEVER EVERAL years ago, in attempting to crack a peach ftone, I broke off a piece of one of my large under teeth, by which means the medullary part of the tooth became diftinctly visible. I felt no inconvenience from it for a long time. But about two months ago it began to trouble me; and, on examination, the hole became gradually enlarged. Examining the tooth by means of a looking-glafs, I faw, among the medulla, a fmall portion of fubftance of a black cleur, which I at firft thought might have been part of the food that had lodged there. I endeavoured to remove it. But not being able to do it by the means which I then ufel, conceded it to be rather a decayed fplinter of the tooth. terwards that if I but opened my mouth fo as to admit the cold air, it prefently difappeared though it was at firft plainly visible; and this, and a more particular examination of its form and colour, convinced me that it was a living infect. I immediately mixed up a little calomel with mucillage cf gum arabic into a pafte, and filled up the tooth with it. The pain ceafed in about a quarter of an hour, and on fearching the tooth afterwards, the worm was found dead, and taken out. I have not fince felt the leaft unealinefs in the tooth; and, therefore, conclude that the pain had been caufed by the infect, which the mercury killed. in en deavouring repeatedly afterwards to get it out, I found that a Con as I touched it with a needle or other inftrument, it eluded my attempt, and funk beneath the marrow. I oblerved af I remember, when quite a boy, to have heard a tooth-drawer in the country affirm that the tooth-ach was occafiored by a worm which preyed on the nere of the tooth, and that the decay of the teeth was oving, at leaft in ma ny cafes, to the fame infect*. I have not *He derived the cure of the tooth-ach by aqua fortis, and the prefervation of the teeth by tobacco, from this theory. not, till lately, thought any thing of this explanation. But the fact above related feems to prove that in fome inftances it may be true; and may, therefore, be thought worthy the confidera tion of thofe who make this branch of the medical art their study. J. ELLIOT No. 26, Great Marlborough-flreets O8. 2, 1783. FOR THE LONDON MAGAZINE. MR. EDITOR, HE infertion of the following paper in the Medical Department of your Mifcellany, may, perhaps, preferve a fellow-creature. If you are of the fame opinion, and choofe to give it a place, you will much oblige N July, 1783, the cook-maid of Mr. Barclay, of Cambridge-heath, Hackney, after dreifing the wedding dinner for Mr. Tritton, banker, who was jaft married to Mifs Barclay, haftily taking up a mug of liquor, which unhappily proved to be poon, he died the fame night, in violent convulfions. Liverpool. In August, 1783, a young child of Captain Bibby's, playing in a neighbour's houfe, got to fome jacob's Water fweetened, placed there to poifon flies, and drank fo much as occafioned its dying the day after convulfed. As this poifon is often ufed, efpecially at this time of the year, and as fimilar accidents in confequence thereof are by no means rare, the following cautions may be useful: 1. If this poifonous mixture (which ought not to be indifcriminately fold) is to be used at all, it should be placed out of the reach of children, and mixed up in a manner dirty enough to difguft, and deter any one eife from a defire to take it. 2. As foon as it is known that a perfon has unfortunately taken any of it, immediate affifiance fhould be procured; a vomit fhould be given directly, and falt of tartar, or pot-ahes, dolved in water, fhould be drank, very freely. The poifon fold under the name of Jacob-Water is fometinies arfenic dillived in water, but that properly fo cailed is only a weak folution of corrofe fublimate; and in that cafe there is the firongeft reafen to believe, that by taking a little of the above alkaline falt after it (and the fooner after it the better) if violent A CONSTANT READER. fymptoms are not already come on, no danger whatever would enfue: and even if fuch fymptoms have appeared, this is one of the most effectual means of relieving and removing them. And if the poifon fwallowed be a folution of arfenic, this would be one of the mott likely means of guarding against its effects, whit at the fame time it will not interfere with any of the ufual methods of obviating the danger. A fuller explanation, and more particular directions, on this fubject, given by Dr. Houlton, may be feen in the Edinburgh Medical Cominentaries, Vol. VI. Part 3, and an abstract of the fame in Dodfley's Annual Regifter, for 1780, as follows: Obfervations on Mineral Poifons. The Annual Register for the year 1778 contained an account of Monf. Navier's propofal of the liver of fulphur as an antidote against certain metallic poifons. This idea, it appears, however, has long before occurred to, and been fuccefsfully applied by, others. We have fince feen a paper on this fab-jest, inferted in the fixth volume of the Edinburgh Medical Commentaries, wherein alkaline falts are recommended on the fame principle. The directions there laid down are full, clear, and eafy, being drawn up with a view to fupply the emiftion en this head in Tiffot and Buchan, authors on whom the public rely greatly and july, bot who have not noticed this efficacious remedy. As the particular fpecies of poifon taken is often not afcertained, Y12 and and the effects produced by it are fo fudden as fometimes not to admit of calling in medical affiftance, it is of importance that a method which bids fo fair to be attended with fuccefs fhould be extenfively known. We, therefore, lay before our readers the concluding paragraphs of that paper; in the former part of which is given the cafe of two women poifoned at Liverpool, in April 1774, with corrofive fublimate, one of whom died, the other, under the direction of Dr. Houlton, took the alkali, by which The found inftant relief, and foon perfectly recovered. The conclufion he draws from the hiftory of this cafe is as follows: "In all cafes of poifon it is prudent immediately to give a folution of an alkali, followed by a vomit. If the poifon be corrofive fublimate, an alkali, either fixed or volatile, will decompofe it, and precipitate the metal in a form nearly inoffenfive. It will have a fimilar effect on the fugar of lead, the extract of lead, emetic tartar, or any metallic falt. If the poifon be arfenic, Newmann obferves, that alkalies will very plentifully diffolve it.' And if fo, as it is difficultly foluble in water, the vomit will then fucceed the better to difcharge it. Whether or no fulphur, exhibited in any form, might lefen the danger of arfenic is not clear, though thefe two, when united, are not poifonous, if the poifon be of the vegetable class, an alkali can be of no differvice, nor interfere with the other means of remedying by evacuation, nor yet by the fubfequent ufe of acids, fo ftrongly infifted on by Tiffot, as coun teracting the effects of narcotics; fince acids, given together with alkaline falts, are pronounced to be attended with great fuccefs in this cafe, by Dr. Mead and others. "To fupply the omiffion then in thofe popular writers, might not the following directions be given on this fubject?" When fymptoms of poifon appear, mix a tea-fpoonful of any of the following articles, falt of tartar, falt of wormwood, pearl-afh, pot-ath, spirit of hartshorn, or fal volatile, with half a pint of water, and of this let one half be given to the patient immediate ly, and the other in a fhort time after-; wards. It will fometimes give great relief, and the vomiting will ceafe, That, however, is to be promoted, and if it does not return on drinking warm water, &c. after waiting a while, it will be proper to give a vomit of ipecacuanha, or, if that is not fufficient, one ftill ftronger. After each vomiting, a dofe of this folution of falt of tartar fhould be given, and it may be repeated every two or three hours, efpecially if the pain of the ftomach return. It fhould be continued too, in finall dofes, for fome time after the fymptoms difappear. If none of thefe falts are at hand, a little woodafhes mixed with boiling water will anfwer the fame end, fuffering them to ftand till they fettle, and pouring the water clear off, or filtering through linen. By tafting it, the degree of faltnefs will determine if the folution be ftrong enough; if it be not difagreeably fo it may be given.' THE ENGLISH THEATRE, AND REGISTER OF PUBLIC ENTERTAINMENTS. HIS winter bids fair to be distinTHIS guifhed for a fpirit of activity and rivalship between the two theatres. This, if properly conducted, muft tend to the advancement of the drama in general, and the peculiar benefit of both authors and managers. The marogers have very properly begun the feafon with the introduction of new performers in old plays, A numerous and refpectable lift is already on our regifter. COVENT GARDEN. IN our laft we mentioned the appearance of Mrs. Johnfon in Rosetta. She has fince appeared in Leonora in the Padlock, and in Mandane in Artaxerxes. Whatever predilection fome may have for a particular favourite in Leonors, we are far from thinking that the the part is beyond the abilities of any FICER was performed. Three new performers made their first appearance. Mr. Bonnor, in Capt. Brazen; Mifs Scrace (now Mrs. Bates) in Sylvia, and Mrs. Chalmers in Rofc. The two former are from the theatre of Bath, the latter from that of Edinburgh. Mr. Bonnor's talents are very properly directed to that caft of parts which has been filled by Dodd, principally fops and fribbles. Mr. Bonnor is a good figure; his manner feems his own, at least he did not remind us of any living actor: his voice is full and ftrong; every word is heard; and his conception of his author is very happy. Before the play he fpoke the follow THE PUBLIC: The RECRUITING OFing Arrive at fome fair stream untry'd before, Should my light bark a hippy pallage boast, From his performance of Roderigo and Oftrick fince, there is every reafon to applaud Mr. Bonnor as an industrious and intelligent performer. Mifs Scrace is an actress of no inferior rank. She has long performed at Bath and Briftol with great fuccefs. Her figure is elegant; her face agreeable and expreflive, and her acting conducted with the greatest chastity and judgement. Her voice is pleafing, fills every part of the houfe, and is capable of great variety. The best fpecimen of her powers was afterwards given in Hyppolita, in the comedy of Sise would and he would not. Perhaps the character never was better perform Should o'er my track no evil ftar prefide, Look back with transport on these first eflays, Ere I withdraw, permit me to implore Have oft' diffus'd their cheering beams o'er me. With Sylvia, too, an untry'd Kofe appears, fame. ed. In breeches fhe is by much the fineft figure now on the flage. From her manner of speaking fome fentences we are deceived if she may not prove a very good fecond-part tragedian. Her profile is a little Siddonian, but her nofe is rather larger. It is somewhat fingular that the morning after her first appearance he was married to Mr. Bates, one of the Harlequins of Covent-Garden. Mrs. Chalmers is a chambermaid, and nothing but a chambermaid. Her manner refembles that of Mrs. Wilfon, although the cannot be faid to imitate that lady, as Mrs. Chalmers has been but a few years on the ftage, and all |