Images de page
PDF
ePub

SMITHFIELD-SMOKE-NUISANCE.

and this completed his round of ecclesiastical preferments. He sighed for a mitre, but it never came; and Lord Melbourne is said to have regretted this omission in his career as Prime Minister. The writings of S. subsequent to 1800 were his contributions to the Edinburgh Review, which he collected and republished, with other miscellaneous works, in 1839; Peter Plymley's Letters, written in 1807, to promote the cause of Catholic emancipation, and abounding in wit and irony worthy of Swift; Sermons in two volumes, 1809; Speeches on the Catholic Claims and Reform Bill, 1825-1831; Three Letters to Archdeacon Singleton on the Ecclesiastical Commission, 1837-1839; The Ballot, a political pamphlet, 1837; Letter to Lord John Russell on the Church Bills, 1838; Letters on Railways, 1842; Letters on American Debts, 1843; &c. Though gay, exuberant, and witty to the last, S. suffered from periodical attacks of gout and other complaints, and he died on the 22d of February 1845. Ten years afterwards, his daughter, wife of Sir Henry Holland, physician, published a Memoir of her father, with a selection from his letters.

and Finsbury, one southward to Ludgate and Blackfriars, and one north-westward to King's Cross and the north of London. In convenient proximity to these, will be a magnificent Dead-meat Market, from the designs of Mr Horace Jones, the city archi tect; it will be an architectural pile 620 feet long by 240 broad, traversed by numerous avenues, and having 200 shops for dealers in meat, mostly countrykilled. This arrangement will enable the city authorities to abolish Newgate and Leadenhall markets, which have became serious obstructions to city traffic. At another part of S., will be a circular spiral road, to give descent to an underground goods-station. The remainder will be laid out in well-paved carriage and foot ways, with possibly a small ornamental green or enclosure opposite St Bartholomew's Hospital.

SMITHSO'NIAN INSTITUTION, at Washington, District of Columbia, U. S., was organised by act of Congress in 1846, in accordance with the will of James Smithson, who bequeathed the reversion of an estate amounting to $515,169 to the United States of America, to be devoted to 'the increase and The works of S. were mostly written on temporary diffusion of knowledge among men.' He was an topics and controversies, yet they bid fair to take a Englishman, a natural son of Hugh, third Duke of permanent place in our literature as specimens of Northumberland, and Mrs Elizabeth Macie, a niece clear and vigorous reasoning, rich unctuous humour, of Charles, Duke of Somerset. He devoted his life and solid good sense. His jokes, exaggeration, and ridicule are all logical, driving home his argument; at Genoa in 1829. The Institution is governed by reto scientific pursuits, especially to chemistry, and died and his wit was sportive, untinctured with malice. gents appointed by the Federal government, and has His views on political and social questions were erected a spacious edifice, with museum, library, cabmoderate, wise, and practical; and he lived to see inets of natural history, and lecture-rooms, which most of them realised. He erred at times in treat- occupies a prominent situation at Washington, the caping sacred subjects with levity and seeming irrever-ital of the United States. It has long been a very valuence; but this fault was one of natural temperament, and had no root in infidelity. He was a sincere, benevolent, and good man, a true patriot, and a happy Christian philosopher.

SMITHFIELD. This name has become so celebrated, in connection with a cattle-market in London, that it has been applied to similar establishments elsewhere. S., in the 12th c., was an open spot which served the citizens as a playground and a place for a stroll. Being a little north of Newgate, and west of Aldersgate, it was outside the city walls. It was in S. that the rebel Wat Tyler met his death in 1381. Several noted tournaments were held here; and the place is associated with trials by battle, the burnings of martyrs, public executions during many centuries, and a variety of incidents connected with the history of the metropolis. The most celebrated fair in England, Bartholomew Fair (q. v.), was always held in Smithfield.

A cattle-market was held in S. at least seven centuries ago, for Fitzstephen mentioned it in 1150. The corporation had official control over the market for more than 500 years, dating from 1345; and the city authorities have never to this day relaxed their hold over the one only live-cattle market in the metropolis. At one time, there was a project for removing the market to a field near Sadlers" Wells, at another, to a spot near the north end of Gray's Inn Lane; while a spirited projector spent £100,000 in building a new market at Islington; but powerful influences prevented the removal of the cattlemarket until 1855. The last market-day in the old spot was on June 11th in that year; after which, the trade was transferred to the large and very complete establishment built by the corporation at Pentonville. Since that day, S. has been of very little practical use. Many conflicting propositions have been made for its appropriation during the last ten years; but it is only now (January 1866) that the plans are definitely arranged. Three railways, sunk deeply below the ground level, occupy parts of the area-one going eastward to Aldersgate

able medium for exchanges with other countries, and its museum is enriched with the gatherings of national exploring expeditions. A portion of its funds is devoted to scientific researches, and the publication of works too expensive for private enterprise. It procures and distributes to students throughout the world collections illustrative of all natural sciences, and when investigated divides the collections with a long list of institutions. Under the management of Professor Joseph Henry, the secretary, have been organised departments of Astronomy, Ethnology, Meteorology, and Terrestrial Magnetism. Among the publications already issued are the Smithsonian Contributions to Knowledge, 16 vols. 4to, distributed gratis to libraries; Annual Reports, and Miscellaneous Collections. The courses of public lectures by eminent scientific men are among the attractions of the American capital.

SMOKE-NUISANCE, in London, is punishable with fine. The act applies to every furnace employed in working engines by steam, and every furnace in any mill, factory, printing-house, dyehouse, distillery, bake-house, &c., which is not constructed so as to consume its own smoke, or which is so negligently used that the smoke is not consumed. The penalty is from two to five pounds. The statute only applies to the metropolis and to the river Thames.-In Scotland, a similar act is not confined to the Scotch metropolis.

Experience has already demonstrated that it is not impracticable, with skilful construction of furnaces, and careful management of fuel, to reduce the evil to such small proportions as to be scarcely worthy of notice; but, excepting in those towns where the law has been rigorously asserted, the nuisance continues to be a disgrace to the sanitary condition of our towns, and to our national The first conditions for character for cleanliness. smoke-consumption are such an arrangement of the furnace as to insure a supply of atmospheric air sufficient for complete combustion, and a judicious

781

SMOKE-STACK-SMOLLETT.

disposal of the fuel itself, in order that the vaporised carbon may be brought in contact with the air in a sufficiently hot condition. The first of these depends upon the construction of the furnace, the latter upon the care and skill of the fireman. The fireman who properly attends his fire keeps it pretty equally distributed as an even bed of burning coal over the fire-bars, and when a fresh supply of fuel is required, instead of throwing it in as far as possible over the burning surface, he piles it up near the furnacedoor, as in fig. 1, which represents a common

[blocks in formation]

furnace, A the fire, B the door, and C the ashpit. The pile of coal, D, being acted upon by the heat, soon gives out its volatile products, and these passing over the intensely hot surface of the partially consumed fuel, are raised to the temperature necessary for combining with the oxygen of the air mixed with them. Thus with careful firing even an ordinary furnace will produce comparatively little smoke. This effect, however, may be heightened by special contrivances in the construction of the furnace. Mr Wye Williams of Liverpool, who has devoted a large portion of his life to this subject, and who has had very large opportunities of experimenting on a grand scale, has pointed out great improvements in the construction of furnaces, the chief principle of which is to bring the atmospheric air into contact with the fuel in a heated state, and to make the fire itself heat the air which is coming to supply it. This arrangement will be best understood by the drawing, fig. 2, which represents one of Mr Williams's

[blocks in formation]

furnos vader a boiler, h. The fire is fed, as usual, through the door at d; it slopes downward to the bridge g, which rises much above the fire bars, so that the flames have to pass over it. The bridge consists of two parts, the solid masonry or brickwork, g, and the chambered portion behind it, c, called the distributer. Into this a tube, b, opens through which a supply of atmospheric air enters, and becoming heated, passes through a number of plates with slits, or with perforations, as shewn in ee', into the mixing-chamber, ƒ; here the heated air enters into combustion with the carbon in the smoke-laden

flame, deprives it of that element, and greatly increasing the heat by its combustion. Mr Williams, as managing director of the Dublin and Liverpool Steam-navigation Company, has had ample means of testing the value of the invention in his Company's works and vessels, and has realised the most successful results. His essay on the subject received the prize of the Society of Art, and its principles are very largely adopted.

Of plans depending upon the slow and regular admission of the fresh fuel by means of machinery, it will be sufficient to notice that of Jukes. His grate-bars are endless chains passing over rollers, and moved forward about an inch per minute. The coal employed is common siftings or screenings, which is heaped on the bars outside the furnacedoor, which slides upwards. The door is left a little open, and by passing under it, the small coal is spread uniformly over the bars. The air is constantly supplied through the bars directly to the fuel while burning, and in this way perfect combustion is obtained. The bars, being slowly moved on, carry the ashes to the ashpit, which lies at the back of the grate. In 1848, Jukes's apparatus was applied to the furnace of the engine which prints the works of Messrs. Chambers, and has been completely successful; it is rare that a single particle of smoke can be seen issuing from the chimney, and the saving in coal and attendance is decided.

SMOKE-STACK, in a steam-vessel, is the group rising above the deck, and comprising the Funnels (q. v.), and the several escape-pipes for the steam, which are beside it. In ships-of-war, all these are frequently made telescopic, that they may be drawn down out of danger in action or in a strong headwind.

SMOLE'NSK, a government of European Russia, bounded on the east by the governments of Moscow and Kaluga. Area 21,380 sq. miles. Pop. (1864) 1,137,212. S., which is watered by the Dnieper, Dvina, Gshat, Oka, Iput, &c., is one of the most fertile provinces of the empire, and produces great quantities of corn, hemp, and flax. Extensive forests yield splendid timber and mast. The rearing of swine is much followed. Manufacturing industry and export trade are both largely expanding.

SMOLENSK, a fortified town of Russia, capital of the government of the same name, is picturesquely situated on a range of steep declivities overlooking the river Dnieper, 250 miles west-south-west of Moscow. It is one of the oldest towns in the empire, having been a place of note in the 9th c., is surrounded by massive walls (with 21 towers), and has three cathedrals, 24 churches, and several monasteries, together with a diocesan seminary, a gymnasium, a military school for nobles, hospitals, &c. S. carries on manufactures of linens, soap, leather, and carpets, and a considerable export trade in corn and flax. Pop. 21,142. S. is historically notable as the scene of a bloody repulse of the Russians, under Barclay de Tolly and Prince Bagration, by Napoleon, August 17, 1812, when on his march for Moscow.

SMOLLETT, TOBIAS, an eminent British novelist, born in the year 1721, was descended from an old and distinguished family in Dumbartonshire. His grandfather, Sir James Smollett of Bonhill, was one of the commissaries or consistorial judges of Edinburgh, and sat in the Scots parliament as representative of his native county. Had the novelist survived about four more years than the term of his too short life, he would, as heir of entail, have succeeded to the ancestral estate in the beautiful vale of Leven. He lost his father while very young; but he was well educated, and afterwards apprenticed to a surgeon

[graphic]
[graphic]

SMOLT SMUT.

SMORZA TO, or SMORZANDO (Ital. dying away), a musical term, indicating a gradual diminution in tone, till the sound altogether fades away.

The

in Glasgow. He is said to have wished to enter the like Fielding, and though less of a literary artist army, and being disappointed, to have avenged than his great English rival, his works are read with himself on his grandfather, who thwarted his inclina- more intense interest. He had, in fact, greater imations, by describing Sir James under the unamiable gination and poetical sensibility. He added largely character of the old Judge in Roderick Random. to our stock of original characters and humorists This is related by Scott and all the biographers, but Strap, Tom Bowling, Morgan the Welshman, it must be wrong; for Sir James, the grandfather, Lismahago, and Matthew Bramble are still unsurdied in 1731, when Tobias was only in his tenth passed. Delicacy of taste was denied to both year. The duty of attending to the education and Fielding and S., and perhaps the latter is the more settlement of the youth would naturally devolve on gross and sensual of the two. But the novelist his widowed mother and on the Laird of Bonhill, his lived in a coarse age, and possessed an exuberant cousin. It is certain, however, that S. inherited no fancy. There is a good deal to regret and to con fortune; and in his 18th year, he went to London demn; but to an author who has conferred so with a tragedy which he had written on the assas- much true, healthy pleasure and enjoyment on sination of James I. of Scotland, and which he countless generations of readers, forgiveness is easily trusted would lead to distinction, if not wealth. He extended, and is soon lost in admiration. was grievously disappointed, and was glad to accept SMOLT. See SALMON. the post of surgeon's-mate on board one of the ships in the unfortunate expedition to Carthagena, in 1741. He soon quitted the service in disgust, although not before he had seen enough of naval life and character to be of inestimable value to him as a novelist; and returning to London, he commenced, and for the remainder of his life followed, the profession of an author. He made, indeed, repeated attempts to obtain practice as a physician, and in 1750, got a diploma of M.D. from Aberdeen; but his hasty irritable temper and independent spirit, joined to his natural propensity to satire, were fatal to his hopes. Even his literary career was a ceaseless warfare. In 1748, in his 27th year, he produced his Roderick Random, which was read with the utmost avidity, and seemed at once to place its author very near, if not in the actual rank of Fielding as a novelist. In 1751, appeared Peregrine Pickle, a more ambitious and not less successful work; and in 1753, Ferdinand Count Fathom, an inferior production, though containing scenes of striking adventure and eloquent description. S. next translated Don Quixote (1755), in which, it is admitted, he was surpassed by Motteux and Jarvis. He then undertook the editorship of a new Tory journal, The Critical Review, which was the most unfortunate of all his engagements, as it involved him in endless quarrels and personalities. For one article, an attack on Admiral Knowles, he suffered three months' imprisonment, and was fined £100. In 1758, he published his History of England, 4 vols. quarto-a history from the descent of Julius Cæsar to the treaty of Aix-la-Chapelle, in 1748, but which was begun and completed in 14 months, realising for its author a sum of £2000. Though superficial and inaccurate, this history has passages of fine animated writing and masterly delineation of character. We next find S. involved in political controversy with Wilkes and others, and defending Lord Bute's administration; but he wanted tact and temper for work of this description, and reaped no laurels as a politician. Another novel appeared in 1760-1761, The Adventures of Sir Launcelot Greaves; in 1766, two volumes of querulous Travels in France and Italy; in 1769, The Adventures of an Atom, a political satire unworthy of its author; and in 1771, only a few months before his death, The Expedition of Humphry Clinker, the best of all the novels of S.; and in the opinion of the late Mr Thackeray, one of the very best in the whole range of imaginative literature. Worn out with literary cares, private misfortunes, anxiety, and ill-health, the novelist retired to Italy, and died at Leghorn, October 21, 1771, in the 51st year

of his age.

As a novelist, S. is distinguished by his broad humour and burlesque, the great variety of his incidents and characters, and the excellence of his easy, picturesque style of narrative. He is often careless, but rarely dull. He does not indulge in digressions,

SMUGGLING is the offence of importing or exporting goods prohibited, or without paying the duties imposed on goods not prohibited. offence in general leads to forfeiture of the goods. If goods are imported to defraud the revenue, treble value of the goods is forfeited. Many of the offences connected with smuggling are felonies, and punished with severity under the Customs' Consolidation Act. Where high protective tariffs separate the industry of adjoining countries, smugglers are certain to abound; no prohibitory decrees can keep the goods out. It was in vain that Napoleon fulminated the Berlin and Milan decrees for closing all continental ports against British shipping; British goods were landed at Salonica, passed on horseback through Hungary to Vienna, and thence distributed in all directions. Similarly, French manufactures reached England, often most circuitously: some a year in transit by way of Smyrna; others, viâ Archangel, after two years' journey. A vast cost was incurred in England in maintaining a Coast Guard and Preventive Service; but so long as smuggled goods could be sold at much lower prices than those at which they could be lawfully imported, so long would it be absolutely impossible wholly The duties on French to suppress the traffic. goods evaded in 1831, by the aid of smuggling, were estimated at £800,000. The true remedy for smuggling is a free, or, at least, very liberal tariff, without any prohibitive rates. Since the adoption of free trade by Great Britain, its Coast-guard has ceased to have any preventive duties to perform, and has been converted into the far better institution of a defence for the coasts from foreign foes, a reserve of trained men for the sea-service, last, though far from least, a branch of skilful auxiliaries ready to aid any ship thrown in distress upon the British coast. The leading instances of smuggling still remaining are the execrable trade in slaves, and the great amount of contraband traffic from Gibraltar into Spain.

and

SMUT, the popular name of certain small fungi of the section Coniomycetes, and group or family Uredineæ, parasitical on plants, particularly on grasses, and notable for the great abundance of dark-coloured spores which they throw off. The name S., although somewhat variously used, is now very generally limited to the genus Ustilago, in which the character just mentioned, of the profusion of dark-coloured spores, is very remarkable. The name S. is often given to Ustilago segetum, or Uredo segetum, also called DUST-BRAND, a species very common and destructive, parasitic on wheat, barley, oats, and rye (see ERGOT), at the base of the germen and glumes, causing the death of the inner parts of

SMYRNA-SNAIL.

the flower, and then converting the whole into a sooty dusty mass. At first, a fine mycelium alone is seen, which ere long produces spores. There is no disagreeable smell, as in some of the allied fungi. A remarkable kind of S. infests maize, swelling the ears to an enormous size, sometimes even a foot in length. No remedy or preventive is known for smut. It does not seem to be communicated through infected grains; but perennial plants attacked by fungi of this kind remain diseased in subsequent years. Some kinds of S. attack other parts of plants than those chosen by Ustilago segetum. The reeds of the fenny districts of England are often much affected by a species (Ustilago typhoides), which much impairs their quality for all purposes, and has the more remarkable property of greatly affecting the health of the labourers employed in cutting and sorting them, producing not only a sense of oppression, but swelling of the head, the formation of vesicles, and inflammation of the bowels, besides other symptoms, such as are often produced by cantharides. Mr Berkeley says: The subject is worth attention, not only as curious in itself, but because it is very possible that, like the ergot, the fungus may afford a valuable addition to the Pharmacopoeia.'

as

SMY'RNA, one of the most ancient and important cities of Asia Minor, and the only one of the Greek cities on the western coast which has retained its name and importance to the present day. The early history of S. is very obscure: varying accounts represent it either as originally an Ionian colony, or as having been at first an Eolian city, which, by an act of treachery, fell into the hands of Colophonian (Ionian) exiles, and subsequently, about 700 B. C., formed part of the great Ionian League. This earliest city of S., known among the Greeks 'Old Smyrna,' was situated on the banks of the little river Meles, on the north-east side of the Hermæan Gulf, now the Gulf of Smyrna, and claimed the honour of being the birthplace of Homer; and here, near the source of the river, a grotto was shewn, in which he was said to have composed his poems. This old city of S. was destroyed, we are told, by the Lydian king Alyattes, and the place remained deserted and in ruins till after the Macedonian conquest, when the city was rebuilt at the distance of between two and three miles south of its original site. This city of New Smyrna' was founded by Antigonus, and enlarged and embellished by Lysimachus; it was laid out with great magnificence, and adorned with several fine buildings, among which was the Homereum, where the poet was worshipped as a hero. The city had an excellent harbour; and from its admirable situation, soon became one of the finest and most flourishing in the world. In the early history of Christianity, S. holds a distinguished place as one of the Seven Churches addressed in the Apocalypse, and as the scene of the labours and martyrdom of its first bishop, Polycarp. After various vicissitudes during the middle ages, it fell finally into the hands of the Turks, in whose possession it has since remained-the most flourishing city of the Levant. The modern city of S. (Turkish Izmir) occupies the site of New S., being built partly on the plain at the head of the gulf, partly on the declivity of a hill, the ancient Mons Pagus, and, from the sea, has an attractive appearance. There are some good quays, and some handsome buildings of stone; but the greater part consists of low wooden houses, for the most part of one story high; and the streets, with a few exceptions, are ill-paved, narrow, crooked, and dirty. The city, however, in these respects is better than most other Turkish towns, and improvements have of late years been made. The pop.

is estimated at 160,000; of whom 90,000 are Turks, 40,000 Greeks, 15,000 Jews, 10,000 Armenians, and 5000 Franks. As is usual in Turkish towns, each people has its separate quarter. S. contains several Greek, Armenian, Roman Catholic, and Protestant churches, and about 20 mosques. There are six journals published here in five different languages. The harbour is excellent; ships of large burden anchor close to the quays; and the trade is most important and extensive. A railway, 83 miles long, constructed mainly with English capital and by English engineers, is in progress to Aidin, an important inland commercial town, and 48 miles of it were in operation in 1863. Another railway, extending 58 miles inland (to Cassaba) was begun in 1864, and will be finished, it is expected, early in 1866. The chief imports are woollen, cotton, and silk fabrics, iron, tin, lead, and hardware goods, coffee to the amount of 6,000,000 lbs. annually, sugar, spirits, spices, indigo, cochineal, &c. The exports consist of wool, cotton, silk, carpets, hides, opium, madder, copper, valonia, olive-oil, drugs, and gums, figs, raisins, and many other articles. In 1864, 2556 vessels (of which 900 were British), of 892,156 tons, entered and cleared the port; and the imports for that year amounted to £3,730,523—the exports to £4,832,979. S. is regularly visited by the ships of the French, Austrian, and Russian Steam-navigation Companies, and by traders from Great Britain and other countries. It suffered severely from fire in the summers of 1841 and 1845, and has been often ravaged by earthquakes and the plague. The city and its territory are governed by a pasha. Of the ancient cities, not much remains. Some slight ruins mark the site of Old Smyrna. Of New S., some remnants of the massive walls on the hill south-east of the city are still to be seen; the site of the Stadium in which Polycarp is supposed to have suffered martyrdom, is pointed out; there are some fragments of the ancient theatre, and columns belonging to a temple; and numberless architectural fragments have been built into the walls of the Turkish town, or used in the construction of graves in the large Turkish cemetery.

SMYRNA, GULF OF, an inlet of the Ægean Sea, from the city of Smyrna (q. v.), which stands at its on the west coast of Asiatic Turkey, is so called head. It is 40 miles long, is about 20 miles in greatest breadth, and contains several islands. Its waters are deep, and it affords good anchorage.

SNAIL (Helix), a genus of gasteropodous molluscs of the family Helicide, having generally a subglobose, sometimes a depressed, spiral shell; the mouth of the shell more or less encroached upon by the last whorl but one, strengthened with an internal thickened rib, its edges more or less reflexed; the foot of the animal long, and pointed behind; the tentacles four, the lower pair much smaller than the upper; the tongue armed with many-often from 100 to 200-longitudinal rows of teeth. The species are very numerous, more than 1400 having been described; besides fossil species, of which also there are many. Some of the groups have been constituted into separate genera by recent authors, but all retain the popular name S., which is indeed often extended to all the Helicidæ. an instance of the general distribution of snails, it may be noticed that Helix aspersa, one of the common garden-snails of Britain, is found very generally throughout Europe, great part of Asia and the north of Africa. Snails feed chiefly on vegetable substances, although they are very indiscriminate in their appetite, and even devour the dead of their own kind. The mischief which they

As

SNAIL SNAKE.

do to garden-crops is too well known; and gar- the 17th c.; but this is very doubtful. It has a deners lay down cabbage-leaves and the like to shell about two inches in diameter and two inches attract them, in order that they may be destroyed; | in height, whitish or pale tawny, with four darker any greasy substance increasing the attractiveness of the bait.-Snails delight in warm moist weather; in dry weather, their chief time of activity is during the night, and they hide themselves by day; but after rain, they come forth at any hour in

[blocks in formation]

bands, often not very distinct. It was much esteemed as an article of food by the ancient Romans, who fattened their snails in enclosures (cochlearia) made for the purpose, feeding them delicately on meal and boiled wine. It is still in much esteem for the table in various parts of Europe, and is occasionally used in England. Nor is it the only species so used; the common garden-snails are pruh ably equally good, although not so large, and the glassmen at Newcastle once a year have a snail-feast; they generally collect the snails themselves in the fields and hedges the Sunday before the feast-day.'Turton's British Land and Fresh-water Shells. Snails* of different species are also an article of exportation on a small scale from England to the United States, packed in old casks, in which they are conveyed very well, fixing themselves one upon another to the cask, and leaving a vacant space in the centre. Snails boiled in milk are popularly regarded as a remedy for diseases of the chest, and for this purpose they are brought to Covent Garden market. If any due to their nutritious qualities.-Some of the benefit results from the use of them, it is probably tropical species of Helix are very large, and some have very beautiful shells.

SNAKE, a term synonymous with serpent.-The name COMMON S. is very generally given in England to a species very abundant in most parts of that country, and throughout Europe from the south of Scandinavia to the Mediterranean, although there is only one doubtful instance of its having been found in Scotland. Its range extends also over great part of the north of Asia. This species (Natrix torquata or Tropidonotus natrix) is also known as the

[graphic]

quest of food. At the approach of winter, or in very dry weather, they close the mouth of the shell with a membrane (epiphragm), formed by the drying of the mucous substance which they secrete, and become inactive and torpid. Some, as the Edible S. (H. pomatia), make a succession of such membranes; the outer one of which is also strengthened by a quantity of calcareous matter, the secretion being at first a white viscid fluid, but quickly hardening like plaster of Paris. When this is to be removed, a fresh secretion of fluid mucus softens it at the edges. Snails retreat into crevices for the winter, or into holes which they make in the earth, and which are roofed over with earth, dead leaves, &c., agglutinated by secreted mucus.-Snails are hermaphrodite, but mutual impregnation takes place, and when they are about to copulate, they excite each other by pricking or even piercing with a sharp calcareous glass-like style, affixed to a peculiar muscular sac which serves for its protrusion, and which is produced by recent secretion, not being found in them on dissection, except at the season of reproduction. Extraordinary as this circumstance is, it has been the subject of much exaggeration, and in works on natural history not of very old date, we read of snails throwing darts (spicula amoris) at each other, all which appears to be merely fabulous, although it is probable that the calcareous style may be often broken off in its use. RINGED S. and the GRASS SNAKE. It belongs to the The eggs of snails are round, and enveloped in a family Colubrida, and to a section of it which some skin; they are generally deposited in little clusters. naturalists constitute into the family Natricide. It The eggs of the common garden-snails of Britain are grows to the length of four and even five feet, about the size of peas, and are deposited just under although specimens exceeding three feet are rare. the surface of the soil.-Snails possess in a very high The female, as in serpents generally, is much larger degree the power of repairing injuries, not only of than the male. The head is ovate, the muzzle rather the shell-although the removal of the whole shell narrow, the back part considerably broader than the is fatal to them--but also of the soft parts. When neck; the body thickens towards the middle, and the tentacles are cut off, they grow again; and even again tapers towards the tail, which is about oneif the head is cut off, a new head is produced.-We fifth of the entire length, tapering to a rather sharp de not think it necessary to describe any of the point; the gape is wide; the upper part of the common British species, as there is nothing of pecu-head covered with large plates; the scales of the liar interest connected with any of them; and the back have an elevated keel; those of the sides are rarer and smaller species have still less claim to larger, the keel merely rudimentary; the belly is notice. The EDIBLE S. (H. pomatia) of the south covered with broad oblong plates; the under part of Europe is the only one that deserves to be parti- of the tail has plates arranged in two rows. The cularly mertioned. It is found in the chalk and teeth are very small, directed backwards, and oolite districts of the south of England, where it is arranged in two rows on each side of the jaws. The said to have been introduced from the continent in upper parts are grayish brown, tinged with green;

[graphic]

414

Ringed Snake (Natrix torquata).

785

« PrécédentContinuer »