Kitabı oku: «The Mirror of Literature, Amusement, and Instruction. Volume 13, No. 372, May 30, 1829», sayfa 6

Spirit of Discovery

Hydrophobia

In the New Monthly Magazine for October, 1826, is the following statement of the efficacy of the guaco for the cure of the bite of a mad dog, published by the gentleman who first made use of the plant in South America, as an antidote to that scourge of human nature, hydrophobia; his words are, "I shall simply state, that during my residence in South America, I had frequent opportunities of witnessing the direful effects of hydrophobia, without having in any one case that came under my care been successful in its cure by the usual modes prescribed in Europe. It fortunately occurred to me, that the guaco, so celebrated for curing the bite or sting of all venomous snakes, might prove equally efficacious in hydrophobic cases. How far my idea was correct that an analogy existed between the virus of a serpent and that of a rabid dog, I leave to others to determine; but such was my opinion, and I acted upon it in all subsequent cases with complete success."

We understand the same gentleman has received from South America two plants which he was in the habit of prescribing for insanity and pulmonary consumption, with the happiest effects; and as it is his intention to give them an immediate trial, should they be found to answer in Europe, as in South America, of which he has not the least doubt, the discovery may be considered as of the first consequence in medicine.

Mutton Hams

The Journal Des Reconnaissances Useless gives the following method of curing legs of mutton like ham:—It is necessary that the mutton should be very fat. Two ounces of raw sugar must be mixed with an ounce of common salt and half a spoonful of saltpetre. The meat is to be rubbed well with this, and then placed in a tureen. It must be beaten and turned twice a day during three consecutive days; and the scum which comes from the meat having been taken off, it is to be wiped, and again rubbed with the mixture. The next day it should be again beaten, and the two operations ought to be repeated alternately during ten days, care being taken to turn the meat each time. It must be then exposed to the smoke for ten days. These hams are generally eaten cold.

Potato Chestnuts

A mode has been adopted to prepare potatoes as food, which has at least one advantage—that of economy. The potatoes are roasted in a kiln or oven, and are thus prevented from sprouting, (which injures their quality so much at this season of the year,) and are thus preserved for some time in a fit state for consumption. They are better for being again heated before they are used, and though it is to be regretted that persons should be reduced to such food, yet they are cheaper and more wholesome than the bread usually given in times of scarcity to the poorer classes.

New Pyrometer

A new air-thermometer has been invented by M. Pouillet, for the purpose of measuring degrees of heat in very high temperatures; an object hitherto of very difficult attainment. By means of this instrument it has been ascertained, that the heat of melted silver is 1677°; of a melted mixture of one part gold and three parts silver, 1803°; and of melted pure gold 2096°.

To Destroy Slugs

A correspondent of the Gardener's Magazine states, that after in vain trying salt, lime, and dibbling holes for preserving young cauliflowers and cabbages from slugs, he succeeded by spreading some well cut chaff round the plants under hand glasses, and some round the outsides of the glasses. The slugs in their attempt to reach the plant, find themselves immediately enveloped in the chaff, which prevents their moving, so that when he raised the glasses to give the plants air, he found hundreds of disabled slugs round the outside of the glasses, which he took away and destroyed.

To make Kitchen Vegetables tender

When peas, French beans, &c. do not boil easily, it has usually been imputed to the coolness of the season, or to the rains. This popular notion is erroneous. The difficulty of boiling them soft arises from an excess of gypsum imbibed during their growth. To correct this, throw a small quantity of subcarbonate of soda into the pot along with the vegetables.—From the French.

Beet Root Sugar

Has now become an article of some practical magnitude in French commerce; since the annual consumption is between seven and eight million pounds.

Silk Trade

It was lately mentioned by Mr. Huskisson, in the House of Commons, as a proof of the flourishing state of our trade, that British Bandanna handkerchiefs were in the course of shipment to India. In addition to this fact, we can state of our own knowledge that they are now exporting to France, in no inconsiderable quantities, not merely as samples, but in the regular course of trade.—For. Quart. Rev.

Electricity

It is curious to take a retrospective view of the mode in which the effects of the Leyden phial were announced to the world, on their first discovery. The philosophers who first experienced, in their own person, the shock attendant on the transmission of an electric discharge, were so impressed with wonder and with terror by this novel sensation, that they wrote the most ridiculous and exaggerated account of their feelings on the occasion. Muschenbrok states, that he received so dreadful a concussion in his arms, shoulder, and heart, that he lost his breath, and it was two days before he could recover from its effects; he declared also, that he should not be induced to take another shock for the whole kingdom of France. Mr. Allemand reports, that the shock deprived him of breath for some minutes, and afterwards produced so acute a pain along his right arm, that he was apprehensive it might be attended with serious consequences. Mr. Winkler informs us, that it threw his whole body into convulsions, and excited such a ferment in his blood, as would have thrown him into a fever, but for the timely employment of febrifuge remedies. He states, that at another time it produced copious bleeding at the nose; the same effect was produced also upon his lady, who was almost rendered incapable of walking. The strange accounts naturally excite the attention and wonder of all classes of people; the learned and the vulgar were equally desirous of experiencing so singular a sensation, and great numbers of half-taught electricians wandered through every part of Europe to gratify this universal curiosity.

It is on the nervous system that the most considerable action of electricity is exerted. A strong charge passed through the head, gave to Mr. Singer the sensation of a violent but universal blow, and was followed by a transient loss of memory and indistinctness of vision. If a charge be sent through the head of a bird, its optic nerve is usually injured or destroyed, and permanent blindness induced; and a similar shock given to larger animals, produces a tremulous state of the muscles, with general prostration of strength. If a person who is standing receive a charge through the spine, he loses his power over the muscles to such a degree, that he either drops on his knees, or falls prostrate on the ground; if the charge be sufficiently powerful, it will produce immediate death, in consequence, probably, of the sudden exhaustion of the whole energy of the nervous system. Small animals, such as mice and sparrows, are instantly killed by a shock from thirty square inches of glass. Van Marum found that eels are irrecoverably deprived of life when a shock is sent through their whole body; but when only a part of the body is included in the circuit, the destruction of irritability is confined to that individual part, while the rest retains the power of motion. Different persons are affected in very different degrees by electricity, according to their peculiar constitutional susceptibility. Dr. Young remarks, that a very minute tremor, communicated to the most elastic parts of the body, in particular the chest, produces an agitation of the nerves, which is not wholly unlike the effect of a weak electricity.

The bodies of animals killed by electricity, rapidly undergo putrefaction, and the action of electricity upon the flesh of animals is also found to accelerate this process in a remarkable degree. The same effect has been observed in the bodies of persons destroyed by lightning. It is also a well-established fact, that the blood does not coagulate after death from this cause.

Transplanting Shrubs in full Growth

Dig a narrow trench round the plant, leaving its roots in the middle in an isolated ball of earth; fill the trench with plaster of Paris, which will become hard in a few minutes, and form a case to the ball and plant, which may be lifted and removed any where at pleasure.—French Paper.

Freezing Mixture

A cheap and powerful freezing mixture may be made by pulverizing Glauber's salts finely, and placing it level at the bottom of a glass vessel. Equal parts of sal ammoniac and nitre are then to be finely powdered, and mixed together, and subsequently added to the Glauber's salts, stirring the powders well together; after which adding water sufficient to dissolve the salts, a degree of cold will be produced, frequently below Zero of Fahrenheit. But Mr. Walker states, that nitrate of ammonia, phosphate of soda, and diluted nitric acid, will on the instant produce a reduction of temperature amounting to 80 degrees. It is desirable to reduce the temperature of the substances previously, if convenient, by placing the vessels in water, with nitre powder thrown in occasionally.

Microscopic Examination of the Blood

By the aid of Tulley's achromatic microscope, and under highly magnifying powers, it has recently been discovered that the globules of the blood congeal into flat circular bodies, and arrange themselves in rows, one body being placed partly underneath another, and in like manner as a pile of similar coins, when thrown gently down, would be found to arrange themselves. This curious effect has been attributed to the vitality yet remaining in the blood, during the act of congealing. At any rate it is a most singular fact, for although we might naturally conceive that the flattened circular plates would place themselves in juxtaposition, yet we never could have supposed that they would have partly slipped underneath each other. In order to make this very curious experiment, it is necessary that the blood, as freshly drawn, be slightly and thinly smeared over the surface of a slip of crown, or window glass, and be covered with a very thin slip of Bohemian plate glass; and thus some slight inequalities in the thickness of the layer of blood between them will be produced, and which are necessary to succeed in producing the very curious appearances abovementioned.—Gilt's Repository.

To make the Liqueur Curaçoa

Put into a large bottle, nearly filled with alcohol, at thirty-four degrees of Baumé (or thirty-six) the peels of six fine Portugal oranges, which are smooth skinned, and let them infuse for fifteen days. At the end of this time, put into a large stone or glass vessel, 11 ounces of brandy at eighteen degrees, 4-1/2 ounces of white sugar, and 4-1/2 ounces of river water. When the sugar is dissolved, add a sufficient quantity of the above infusion of orange peels, to give it a predominant flavour; and aromatise with 3 grammes of fine cinnamon, and as much mace, both well bruised. Lastly, throw into the liqueur 31 grammes (1 ounce) of Brazil wood, in powder. Leave the whole in infusion ten days, being stirred three or four times a day. At the end of this time taste the liqueur; and if it be too strong and sweet, add more water to it; if too weak, add alcohol, at 30 degrees; and if it be not sweet enough, put syrup to it. Give it colour with caramel when you would tinge it.—From the French.

Subterraneous Growth of Potatoes

A mixture of two parts Danube sand, and one part common earth, was laid in a layer an inch thick, in one corner of my cellar; and, in April, thirty-two yellow potatoes with their skins placed upon its surface. They threw out stalks on all sides; and, at the end of the following November, more than a quarter of a bushel of the best potatoes were gathered, about a tenth part of which were about the size of apples—the rest as large as nuts. The skin was very thin; the pulp farinaceous, white, and of a good taste. No attention was given to the potatoes during the time they remained on the sand, and they grew without the influence of the sun or light. This trial may be advantageously applied in fortified places, hospitals, houses of correction, and, in general, in all places where cellars or subterraneous places occur, being neither too cold nor too moist; and where it is important to procure a cheap, but abundant nourishment for many individuals.—From the French.