ly after leaving the vessel of hydrogen, but it soon goes off. No instance has yet occurred in which this effect on the voice has not been produced by the hydrogen. Comet. It has been ascertained that one and the same comet returned to our system in 1786, 1795, 1801, 1805, and 1818-19. It appears never to range be yond the orbit of Jupiter. Its short period of little more than three years and a quarter, and its mean distance from the sun, which is not much greater than twice that of the earth. It crosses the orbit of the earth more than 60 times in a century, but this need excite no apprehension in those who deny the phantom of attraction -it may disturb and divert the energy of the sun's force on the earth and moon, but can in no way attract, as is vulgarly supposed. Northern Discoveries.--Lieut. Franklyn, who was employed last year in the British expedition to the North Pole, set out lately from a station belonging to the Hudson's Bay Company, on a mission to explore the Countries situated to the North of Hudson's Bay. He will proceed in the track pursued by Mr Hearne, some years ago, to the mouth of the Copper River, and thence renew his route in such directions as the circumstances of time and place may indicate, for the attainment of the objects of his undertaking. Lancasterian Schools.-The Lancasterian method of instruction appears to be rapidly spreading over every part of Europe, while Mr L. is an Exile in America. In Spain, a royal decree has authorized the erection of a central school at Madrid, and others in the various communes of the kingdom. In Portugal the system is carried on still more energetically, and many of the pupils are soldiers in the army. In Denmark, on the 21st of August, the Lancasterian school of Copenhagen contained 162 scholars. France.-M. the Count de Forbin, author of the Voyage to the Levant, has set out for Sicily, to visit the antiquities of that island. He takes with him M. Huyot, as designer, who had been the companion of his former voyage. M. Gamba, a merchant, who has long resided in Paris, is about to proceed on a Tour to Asia, and the Banks of the Caspian Sea, to investigate various objects of a scientific and agronomical character. Germany-New University.-An University at Bonne has lately been founded by the King of Prussia, and endowed in the most liberal manner. The immense chateau of Bonne, ci-devant residence of the Elector of Cologne, is appropriated to the university; and the fine chateau of Poppledorf, with its plantations, are to be the botanical gardens. A large astronomical observatory will be immediately erect ed. Many libraries have been acquired by purchase and donations. The anatomical theatre, the medical and surgical hospitals, and the institution for midwifery; the cabinet of physic, the laboratory, the museum of natural history, of antiquities, of Roman and German coins, medals and monuments, found in the environs of Bonne. There are at present forty-five professors placed in the University by the King of Prussia. Italy.-Herculaneum.-In addition to former notices respecting the MSS. found in Herculaneum, we have to announce the enrolling of eighty-eight. Most of these consist of works by the Greek philosophers or Sophists; nine are by Epicurus; thirtytwo bear the name of Philodemus, three by Demetrius, one by Calotes, one by Polystratus, one by Carniades, and one by Chrysippus. These works, with like others, the authors of which are unknown, treat of natural or moral philosophy, of medicine, of arts, manners and customs. Pompeia. At Pompeia, there have been recently discovered several fresh buildings, in the line of the beautiful street that leads to the Temple of Isis, to that of Hercules, and to the Theatre. In a house which doubtless was the residence of some experienced medical practitioner, chirurgi cal instruments, of a highly finished workmanship, have been found, with a number of excellent paintings, representing fruits and animals. Egypt.-Canal of Rosetta.-It appears by the news from Egypt, of the 20th of September last, that the labours of the canal of Rosetta are proceeding with all imaginable activity, and it was then calcu lated, that the waters of the Nile might be introduced into it by the middle of October. In Upper Egypt, some discoveries have been made of certain iron and lead mines. Mehemed Ali Pacha has sent a number of chemists and miners, to make researches for the gold and emerald mines that have been buried for some centuries, and he has promised a very great reward to any that shall discover a coal mine in Upper Egypt. After M. Frediani, of whom a rapid notice has been sketched in the different public jour nals, was, the winter before last, at Palmyra; he then visited Egypt, and proceeded to the mountains of Sinai and Horeb, in the route of the children of Israel. this he came to Tor, in Arabia Petræa, on his return from the delectable region of Elim; this was in May 1819. He stopped there some weeks, for rest and recrea tion, and was then intending to prosecute further discoveries. The foreign journals report the arrival of M. Belzoni at Venice, from Alexandria, and that he had just finished his quarantine there. From Venice he will proceed to Padua, his native city, and from thence to Paris and London, where he means to publish a detailed account of his different la bours. United States.-The Gazette of St Louis (on the Missouri, United States) announces the equipment of an expedition, the object of which is to ascertain the existence of a race reported to be the descendants of certain Welsh emigrants; they intend to comprehend all the southern ramifications of the great river Missouri, within the limits of their excursion. This undertaking is confided to Messrs Roberts and Parry, both Welshmen, and well acquainted with the language of both North and South Wales. Native Iron.-A mass of native iron, weighing upwards of three thousand pounds, discovered several years ago on the banks of Red River in Louisiana, is now in the collection of the Historical Society in the New York Institution. Its shape is irregular, inclining to oviform; its surface deeply indented, and covered by an oxide of iron, and it is much broader at the bottom, where it has rested on the earth, than at the top, inclining somewhat in the manner of a cone. By several experiments which have been made upon different pieces of it, there appears to be a want of uniformity in its quality, some parts being very malleable and ductile, while others possess nearly the hardness of steel. It is suscepti ble of the highest polish, and is said to contain some nickel. This mass of iron was found about one hundred miles above Natchitoches on Red River, on one of those rich and extensive prairies so common to that part of the country, and about twelve miles from the banks of the river. Nitre. On the banks of the Merrimack and the Gasconade are found numerous caves which yield an earth impregnated largely with nitre, which is procured from it by lixiviation. On the head of Current's river are also found several caves from which nitre is procured, the principal of which is Ashley's Cave on Cave Creek, a bout eighty miles S. W. of Potosi. This is one of those stupendous and extensive caverns which cannot be viewed without exciting our wonder and astonishment, which is increased by beholding the entire works for the manufacture of nitre situated in its interior. The native nitrate of potash is found in beautiful white crystals, investing the fissures of the limestone rock which forms the walls of this cave; and several others in its vicinity exhibit the same phenomenon. Hot Springs.-The Hot Springs of Ouachitta, which have been known for many years, are situated on a stream called Hotspring Creek, which falls into the Washitaw river eight miles below. They lie fifty miles south of the Arkansaw river, in Clark county, territory of Arkansaw, (late ly Missouri,) and six miles west of the road from Cadron to Mount Prairie on Red River.-The approach to the springs lies up the valley of the creek. On the right of the valley rises the hot mountain with the springs issuing at its foot; on the left, the cold mountain, which is little more than a confused and mighty pile of stones. The hot mountain is about 300 feet high, rising quite steep, and presenting occasionally ledges of rocks, it terminates above in a confused mass of broken rocks. The steep and otherwise steril sides are covered with a luxuriant growth of vines. The valley between this and the cold mountain is about fifty yards wide. The springs issue at the foot of the hot mountain at an elevation of about ten feet above the level of the creek; they are very numerous all along the hill side, and the water which runs in copious streams is quite hot; it will scald the hand and boil an egg hard in ten minutes. Its temperature is considered that of boiling water, but Dr Andrews, of Red River, thinks it is not above 200° Fahr. Burning Spring.-A phenomenon which has for several years excited the attention of travellers, under the name of a burning spring, exists in one of the principal forks of Leeking River, Kentucky. It is situated about three-fourths of a mile from the banks of the river, and about eighty miles above its junction with the Ohio, opposite Cincinnati. A spring here breaks out at the foot of a hill, forming a basin of water about six feet in diameter, and two feet deep, at the bottom of which issues a stream of gas, which in volume and force is about equal to the blast forced from a common smith's bellows; but there is no cessation of its force, which is such as to create a violent ebullition in the water. Being heavier than common atmospheric air, the gas on passing up through the water constantly occupies the surface, which is still the lower part of an indenture in the earth at that place. On presenting a taper this gas instantly takes fire, and burns with great brilliancy. East Indies. For some years past, a trigonometrical operation has been conducted in India, under the auspices of the local governments. Lieut.-Col. Lambton has been enabled, by the aid of their proceedings, to measure, at different periods, an arc of the meridian from 89 9' 38" to 18° 3' 23" of north latitude, the greatest that has been measured on the surface of the globe. From a review of these opera tions, it appears that a degree of the meri dian, near the equator, contains 68,704 English miles; that in 45o of latitude, it is 69,030; in 51°, 69,105; in 90°, 69,368. So that a degree of latitude, at a medium estimate, makes exactly 69 1-10th English geographical miles. WORKS PREPARING FOR PUBLICATION. LONDON. PRINCE MAXIMILIAN's Travels in the Brazils, which have excited so great an interest, owing to the quality and character of the traveller, will speedily appear at large, with many engravings, in the Journal of New Voyages and Travels. In May will be published, Travels in Sicily, Greece, and Albania; by the Rev. T. S. Hughes, fellow of Emanuel College, Cambridge. Each volume will be adorned with engravings of maps, scenery, plans, &c. A Grammar of the Arabic Language is preparing for the press; by James Grey Jackson, Professor of Arabic; and late British Consul at Santa Cruz, in South Barbary. No accurate Grammar of the Arabic Language having yet issued from the British Press, an attempt will now be made to supply in England this deficiency in Oriental Literature. An Account of the Abipones, an Equestrian People in the Interior of South America, translated from the original Latin of Martin Dobrizhoffer, one of the ExJesuits, two and twenty years a Missionary in Paraguay, is in preparation. Travels in England, Wales, and Scotland, in the year 1816; by Dr Spiker, Librarian to his Majesty the King of Prussia, have been translated from the German, and will be published in the ensuing month. Mrs Opie's Tales of the Heart will be published in the course of May. Lochiel; or, The Field of Culloden, a Novel, is in the press. It is proposed to publish six monthly parts of Picturesque Illustrations of Bue nos Ayres and Monte Video: consisting of Views, and faithful representations of the costumes, manners, &c. of the inhabitants of those cities and their environs, taken on the spot by E. E. Vidal, Esq.; and accompanied with descriptive letter-press. Also a Picturesque Tour of English Lakes: illustrated with forty-eight coloured views, drawn by Mrs T. H. Fielding, and J. Walton, during two years' residence in the most romantic parts of Cumberland, Westmoreland, and Lanacashire, nd the whole of them engraved in aquatinta by Mr T. H. Fielding. Shortly will be published, Tabella Cibaria: the Bill of Fare; a Latin Poem, with Notes, Observations, and Directions, relat ing to the pleasures of Gastronomy, and the mysterious Art of Cookery. Illustrations of Cases of Tic Douloureux successfully treated, are preparing by Mr B. Hutchinson, Member of the Royal College of Surgeons. Miss Holford's Novel of Sir Warbeck of Woolfsteen, 2 vols. is in the press. Dr Brown's Antiquities of the Jews, 2 vols. 8vo. A work on Early Education, or on the general management of Children, consider. ed with a view to their future character, is preparing, by Mrs Elizabeth Apple ton. Stories founded on Facts, by Mrs Grant, of Croydon, author of "Sketches of Life and Manners," and "Delineations of Scenery," &c. 12mo. Two volumes of Ancient Spanish Romances, relating to the Twelve Peers of France, mentioned in Don Quixote, with English metrical Versions, by Thomas Rodd, preceded by the History of Charles the Great and Orlando, translated from the Latin of Spanheim, are printing. A periodical series is about to be commenced, called El Teatro Espanol Moderno, of which the first Number will contain five plays of Moratin, with his Por trait. The Rev. John Davies, A. M. Curate of Kew, is preparing a work entitled, Historical Prologues, or a versified Chronology of Events from the Conquest to the Death of George the Third. Mr G. R. Rowe, F. R. C. S. of Haverhill, Suffolk, will speedily publish a Prac tical Treatise on those Nervous Disorders denominated Hypochondriasis, and Dys pepsia, or Indigestion, equally addressed to the public and profession. A System of Education, intended for the King of Rome, and other Princes of the Blood of France, drawn up by the Impe. rial Council of State under the superintendence of Napoleon, and finally approved by him, is printing in French verbatim, with an English translation. Dialogues, Moral and Religious, intended chiefly for the domestic use of young persons in the middle ranks of life, are printing. Mr T. Williams is preparing for the press a Memoir of his late Majesty and the Duke of Kent, as a companion to those he published of the late Queen and Princess Charlotte. Mr Bischoff is preparing a third edition of his Reasons for the immediate Repeal of the Tax on Foreign Wool; with an Appendix, clearly shewing the injurious ef fects of that Tax. The Literary and Political Life of Augustus Von Kotzebue. Translated from the German. 12mo. Russian Tarif for 1820, containing all the Duties of the Russian Empire. Eva Marcian Colonna, a Poem in three Parts, to which will be added, Dramatic Sketches, and other Poems, by Barry Cornwall. EDINBURGH. An Arabic Vocabulary and Index for Richardson's Arabic Grammar; in which the words are explained according to the parts of speech, and the derivatives are traced to their originals in the Hebrew, Chaldee, and Syriac Languages; with tables of oriental alphabets, points, and affixes; by James Noble, teacher of languages in Edinburgh, is preparing for the press, and will be published in July next. This Work, like Sir William Jones's Index to his Persian Grammar, is intended, by explaining all the difficulties which occur in translating the numerous extracts from Arabic authors found in Mr Richardson's Grammar, to facilitate the study of the Oriental languages, which are so interesting in themselves, especially the Arabic, from the great stores of literature that are contained in them, whilst, from their close connection with the Hebrew, they must always contribute highly to the proper interpretation of the Original Scriptures. By giving, also, full English explanations of every Arabic word that occurs in the Grammar, tracing it at the same time, if derivative, to the Hebrew, Chaldee, or Syriac, in which the root of it is to be found, the trouble of having recourse to large dictionaries is rendered unnecessary, till the student has made some progress in the elements of the language; and an interesting field of philological research is likewise opened up to his view, in the very intimate relation which subsists between the Arabic, the Persic, and the other Oriental dialects, of which the Hebrew forms the original and fundamental language. This intimate relation will be clearly seen in this Vocabulary, which contains nearly 1600 Arabic words, and of these scarcely less than 1200 are plainly traced to their originals in the Hebrew, Chaldee, and Syriac languages. The engraved Table of Alphabets, intended to form the frontispiece of the Work, will also exhibit distinctly, at one view, the affinity between the Hebrew, Samaritan, Ethiopic, Syriac, Arabic, and Persic Alphabets, with the value of the letters employed in them to represent numbers. The Work will be elegantly printed on fine paper, in Quarto, to bind up with Mr Richardson's Grammar, to which it is intended to form a sequel. In the Press, Sermons by Ministers of the General Associate Synod. In 2 vols. MONTHLY LIST OF NEW PUBLICATIONS. LONDON. AGRICULTURE. A New System of Cultivation; by Mr Beatson. 8vo. 9s. bds. An Inquiry into the Causes of the progressive Depreciation of Agricultural Labour in Modern Times; with suggestions for its Remedy; by J. Barton. 8vo. 4s. ARITHMETIC. An Introduction to Arithmetic, in which the Primary Rules are interspersed with a variety of Biographical, Historical, and Miscellaneous information; revised and enlarged; by R. Chambers. 2s. BIBLIOGRAPHY. A Catalogue of Old Books, comprising various classes of Literature in the English, Greek, Latin, Dutch, German, Italian, Spanish, French, and Russian Languages; by J. Hearne. 2s. A Catalogue of Books, Ancient and Modern, now selling at the prices affixed to each article, by John and George Todd, Stonegate, York. 2s. A General Catalogue of Old Books for the year 1820; to be sold at the affixed prices, by Longman, Hurst, Rees, Orme, and Brown, Part II. 25. EDUCATION. Le Pronunciation Angloise rendue facile par Analogie. 12mo. 4s. 6d. Maillard's Treatise on the Participles of the French Language. Nouveau recueil de Contes et Anecdotes Françoise Italien. 12mo. 6s. Chefs d'Euvre of French Literature, consisting of extracts from the Classic French Writers, in Prose and Verse. 2 vols. 8vo. 12s. each. 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