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dulge delicious error ? Yet, though ACTION OF HYDROCYANIC the inevitable stroke cannot be ACID ON THE ANIMAL turned aside, its destructive effects ECONOMY. may be lessened; and an investi. As a medicine this acid has been gation of the real action of thunder extensively tried in France, Gerwill conduct us to the proper prin- many, Italy, and our own country, ciples.”

and several treatises have been We have some doubts of the published extolling its virtues, and accuracy of this theory. The Pro- describing the wonderful effects fessor states, that when the “ low- which it is capable of producing. est verge of the cloud touches the It is chiefly efficacious in comground, a total discharge is made;" plaints of the chest, and its exbiand also, “ that the cloud rolls bition, even in these affections, towards the nearest and most ele- requires (as we have been informvated objects." We would, there. ed) considerable discrimination. fore, beg leave to ask, when a But this, like many other remecommunication is established be- dies which have been indiscrimitween the earth and the cloud by a nately praised, does not enjoy the lightning conductor, if a total dis- extensive reputation it once did. charge will not be made ? if this, When a new remedy is proposed, in fact, does not take place on a its virtues are frequently overrated, small scale in all discharges of the The cases in which it is tried electrical machines; and, in fact, happen to be benefited during its whenever a cloud comes in contact exhibition, and the new medicine with a tree, a rock, or a spire? gets the credit; other causes, which We would further ask, if a light-, may have materially assisted, being ning conductor may not, like a tree left out of the question, Indolent or a spire, establish a connexion persons, glad to have any excusebetween the earth and the cloud, for not exerting themselves, seeing and discharge it? But the Pro- that the vaunted remedy, does not fessor: gives up the only practical answer their expectativns, readily point worth contending for, when cast it aside, without endeavourhe recommends that ribands of ing to draw a line of distinction copper should be extended from between the cases in which it is of masts of ships to their keels. We use and those in which it is mis- have no theory on this subject, and chievous. Thus from misdirected do not pretend to account for these enthusiasm on the one hand, and facts; but if they are correct, the indolence on the other, really vaProfessor's objections to lightning luable remedies often meet with conductors are unsatisfactory. We neglect. This medicine, when believe, nobody ever expected that taken in too large doses, produces a rod should equal a mountain in instantaneous death. From the capacity; but it may harmlessly Annales de Chimie for October 1814, communicate the electrical stroke we learn that a professor of che. from a cloud to the ground, and mistry inadvertently left on his carry that stroke past the house., table a phial filled with a solution At the same time, we readily admit of prussic acid in alcohol, and that that he has stated so many circum- a female, seduced by its agreeable stances which show the possibility smell, drank a small glass full of of opposing currents of air carrying it, and soon expired, as if struck off electricity, that we cordially by apoplexy.' In Dr. Granville's subscribe to the notion of a rousing Treatise* on this acid, we find the kitchen fire being a good preventive following case; it is taken from against a house being struck, and Hufeland. D. L. a robust and wish that all men were in a condition to employ so cheerful a guard.

* Historical and Practical Treatise on the Internal Use of the Hydrocyanic

Acid, by A. B. Granville, M, D., &e. &e. " , London 1820,

healthy man, aged thirty-six years, and vomited twice; in a short on being seized as a thief by the time it recovered. In five hours' police officers, snatched a small time eight drops more were given sealed phial from his pocket, broke to it, when the animal instantly off the neck of it, and swallowed experienced the following sympthe greatest part of its contents. toms : - cough, flow of saliva, A strong smell of bitter almonds quickened respiration, weakness soon spread around, which almost of the hinder extremities, plaintive: stupified all present. The culprit cries, purging, bending of the body: staggered a few minutes, then, backwards, dilatation of the pu.. without a groan, fell on his knees, pils, rigidity of the muscles, and and sunk lifeless on the ground. in less than five minutes, paralysis' Medical assistance being called in, of the hind feet first, then of the not the slightest trace of pulse or fore feet; general insensibility, exbreathing could be found. A few cepting of the rump, which was minutes afterwards, a single and occasionally agitated; accelerated violent expiration occurred, which pulse, from 72 to 150 in the minute, was again repeated in about two great mobility of the eyes and eyeminutes. Tbc extremities were lids, and at last complete stupor. perfectly cold, the breast and ab- Fifteen minutes after this the anidomen still warm, the eyes half, mal arose, voided its urine, bent open and shining, clear, lively, full, the body backwards, and in half almost projecting, and as brilliant an hour was restored. On the folas those of the most ardent youth lowing day, sixteen drops of the under violent emotion. The face same poison were again given to was neither distorted nor convuls- this animal. Instantly, quickened ed, but bore the image of quiet respiration, very violent cries, consleep. The corpse exhaled a strong vulsions, opisthotopos (bending of smell of bitter almonds, and the the body forwards), then emprosremaining liquid being analyzed, thotonos (the contrary motion), thewas found to be a concentrated fore fect placed on the head, genesolution of prussic acid in alcohol. ral tetanus, dilated pupils, ears Several cases are also on record of stiff, urine copious, general parapoisoning by the distilled water of Jysis, lapping of the tongue, eyes the cherry laurel, the leaves of this fixed, eyelids in piotion. Five or plant, and the essential oil of six minutes afterwards, respiraalmonds, which we have not room tion difficult, trismus irregular to insert.* All of them, however, and unexpected movements. At show the dreadful effects which the end of half an hour the animal substances containing the prussic raised itself, and appeared to suffer. acid are capable of producing. The in the stomach; was frightened at modus operandi of hydrocyanio acid the least noise, sought the dark, appears to be through the medium and greatly trembled. One hour of the nervous system; and we will - after, it ate with a voracious aphere relate one or two of the ex- petite. periments made with this sub- Erperiment 2d. When thirty or stance on animals, by M. Orfila,t forty drops of prussic acid were to show the symptoms it produced. administered to dogs or cats, they

Erperiment 1st. Two drops of put forth cries more or less violent, prussic acid were given to a young had conyulsive motions, and exdog; immediately afterwards the pired six, twelve, or fifteen minutes respiration was accelerated, its after taking the poisonous substep became uusteady, the animal stance. fell, made water in abundance,

On examining the bodies of

animals, or persons poisoned by * Vide Paris and Fonblanque on Me.

this acid, no traces of inflammadical Jurisprudence, vol. ii. p. 400.

tion are to be observed; there is ** * Traité des Puisons, par M.P.Orfila,

congestion of the veins, whilst the tom. ii. p. 168.

arteries are empty, We are not

the negative electricity is inore caustic, and, as it were, aikaline. Berzelius. Journal of Science.

PRESERVATION OF SEEDS.

The late M. Zea, the celebrated Peruvian botanist, asserts, that the most delicate seeds of American plants may be sent to Europe in the highest preservation, by being enveloped in that kind of raw brown sugar which always keeps

its humidity. When the seeds are FRAGRANT LAMPS. to be sown, it is only requisite to MR. Epitor. -Perhaps you may immerse them in lukewarm water, thank me for the following little which will take off the sugar. account of a method of prescrving the air of : apartments compara- NATURAL CARBONATE OF tively pure, and at the same time

SODA. of dispersing a pleasant fragrance

M. Rivero, of Santa Fé de Bothrough them. By means of a wire

gota, informs us, that he finds the fixed to one side or at the back

following to be the constituent part of the lamp, according to its

as parts of the natural carbonate of naturo, and bent at right angles, ..

s soda of the lake of Merida, in Coso as to be a few inchos above the i

lombia :top of the flanne, a piece of sponge Carbonic acid .....0.3900 is to be suspended. This is to be

Soda .............0.4122 0 soaked in a mixture of best vine

Water ...........0.1880 gar and water, and squeezed nearly

Loss ..............0.0098 dry before it is hung up. By this , Jameson's Philosophical Journal.ineans the vinegar is constantly dispersed through the apartment, COLOURED FLAMES... and gives a very fragrant smell. ' It would probably be very useful ADD a little boracic acid to a in manufactories and close. work- spoonful of alcohol, and stir them

shops, and is of course as easily together in a saucer or cup, then Dapplicabie to gas as other lights. set them on fire, and the flame will

It costs very little, for the same be of a beautiful green colour. , If 10 piece of gponge has served me a strontites in powder be added to nwhole winter. It must be occa- alcohol, it burns with a carmine $sionally re-immersed in the water flame; if barytes be added, the 10 and vinegar, and then will be found flame is yellow ; if the alcohol con90 to give out a great quantity of tạin muriate of magnesia, it burns i spot, which otherwise fouls the air with a reddish-yellow flame. of the apartments. 13 hou nogle s

m ontar 08., Your obedient servant, 1 BETO MAKE AND DESTROY

its und Ein DEUTSCHER. -01911991COLOURS. vbidino s potrw bloo 10 wa

*

DOD Batmnch sulphate of copanyiswa bag 1982 3.6512 9810 DROP, as much surplate o 91 DISTINCTION OF POSITIVE per into water as forms a colourless *, AND NEGATIVE ELECTRI- solution, add a little ammonia, 9 CITY

W T

which is equally colourless, and te Positive and negative electricity the mixturo becomes of an intense is may be readily distinguished by blue colour. Add again a little al the taste, on, making the electrie sulphuric acid and the colour disaz current pass by means of a point appears, which is again- restored ai on to the tongue. The taste of the by a little solution of caustic an

positive electricity is acid ; tbåt of wonia. US TOOLS - wong

W

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cooling, or requires to heat it. It CARBON, pure charcoal. An elea has been ascertained that almost mentary substance. every body with which the experiment has been made differs from every other in this respect, and POTATOES. A SUBSTITUTE therefore all bodies have a specific . FOR SOAP... caloric which may be expressed . It is stated in the Bulletin Techwith relation to water. The other nologique, that potatoes, threeterms have all been applied to this fourths boited, employed instead difference of capacity in bodies for of soap, are more efficacious heat, but specific caloric is now the than it in cleansing clothes of phrase most generally adopted. : all descriptions. They are used

CALORIMETER. An instrument as soap, and the clothes are for measuriog the heat given out otherwise washed in the same by a body in cooling ; both ice and manner, though without employing water are employed, and the latter any alkali. This will, however, be is now preferred, but originally the of little use in England, where first alone was used.'

iwashing by steum is growing fa:: Cameleon MINERAL. A curious shionable. By the bye, we wonder substance, so named from the the washerwomen of the kingdom changes which take place in its have not united to petition Parliacolour, and formed by fusing an ment against the new Steam-washalkali with black oxide of manga- ing Company. Were this laudable nese.

body properly represented in par. - CAMPEACHY WOOD, logwood. A liament, the trade of the wash-tub well-known dye.

could not be thus injured with imCAMPHOR. A wbite concrete punity. We are afraid our publisubstance, resembling spermaceti cation is not much studied by in appearance, but having a strong, them; but if the ECONOMIST were Jively, acrid taste. It is obtained under our direction,' we should from the roots, wood, and leaves certainly rouse these much-injured of two species of laurel which grow women to take care of their own in the eastern part of the world. interest. It is used chiefly in medicine. : i ;

CAMPHORATES, Salts composed 'of camphoric acid and a base, of · TO CORRESPONDENTS. which nothing is known. .

We are glad to see the hand-writing - CAMPHORIC ACID. A peculiar again of our friend The Chemist, and acid obtained from camphor. : ; CANNON METAL.

congratulate him on his return....

An alloy of 100 parts copper and 10 or 12 of Mr. Thompson is informed, that we tin. .

.

. . know of no, book like the one he men· CANTHARIDIN. A name given to tions ; and that, in no treatise on disthe peculiar substance extracted tillation, with which we are acquainted, from cantharides, or Spanish flies, is any thing suid of the subject on which which excites blisters when ap.i he requires information. He will find plied to the skin.

; " some observations in all chemical: treuCAOUTCHOUC, India rubber. Elas-: tises, but there is no separate work on tic gum. Is the dried juice of some this particular branch. He should, plants, such as the jatropa elastica, however, rather upply to his own bookwhich grow in hot climates. It is seller than to us. a very useful substance, and from ;*** Communications (post paid to the late improvements in the ma-' be addressed to the Editor, at the Pubnagement of it, promises to be of lishers'. still greater service in the arts.'

MINERAL. A sub-' stance resembling India rubber. London: Published by KNIGHT and LA

CEY, 55, Paternoster-row.-Printed by. found in Derbyshire..

B. Bensley, Bolt-court, Fleet-street,

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