and, when thoroughly ignited, every opening to the external air is suddenly and accurately closed, except only the opening into the chimney, or other machinery upon which the power is to be exerted. The gas, air, &c. which was previously contained in the tube, chimney, &c. will, by the action of the heat, dilate and expand with great force and rapidity, and thus generate a most useful and extensive power; and, having taken advantage of this expansive power, the cock between the furnace and chimney is closed; and, at the same time, the other cock which prevented the atmospheric air from having access to the fire, is opened, by which it burns up very bright: or sometimes the fire is withdrawn with the furnace; and, upon carefully closing all communication of the external air with the chimney as rapidly as possible, the space which was lately dilated and expanded, now becomes cooled and condensed, and leaves the internal capacity in a state approxmating towards a vacuum; and thus, by the alternate opening and shutting of the cocks, &c. or by alternately introducing and withdrawing a moveable fire, with its furnace, an alternate force or power will be generated, acting first by the pressure of the dilated or expanded air, and then by the vacuum or vacuous space; both of which forces, or powers, may be applied to the immediáte raising of water in tubes, or by other means, to the working of various pumps, or to the motion of pistons. But, as the machine will act by the expansive force of the heated air, or by the vacuum, or by both conjointly, it may be employed in either-or all these manners, as may best suit the case required, as a first mover, to give motion to machinery, and to produce all the useful effects which can result from the employment of steam, or any other clastic and expansible fluid.

Although this power will produce its effect by the alternate opening and shutting of the communications through one chimney, yet the alternate or conjunctive use and operation of two or more chimnics may be advantageously cmployed to produce a greater and more continuous effect. The patentce claims and reserves to himself the right of applying fire or heat to the criopyrite, in any form or direction that may be suited to the situation and circumstances under which the machine may be erected; and he claims so to avail himself of the ordinary action and effect of combustion

in any way whatever; and likewise of any arrangement of cocks and sliders: and of immersing the chimney, cocks, &c. in water, or other cooling agent, in case a more rapid condensation be required than could be produced without such means, by the ordinary process of cooling and condensing in the open air.

To Mr.WILLIAM BELL, Birmingham, for a new Method of Making and Manufacturing Wire of every description. For this purpose metallic rollers are used, such as are described by drawings attached to the specification; and in order to obtain the impressions for rolling the different sorts of wire, the rollers are indented by turning in them fluted hollows, reeds, or any other required form. Otherwise he produces the impressions by filing, cutting, punching, or by casting his rollers with the impressed form upon them from patterns or moulds, made for that purpose. The rollers thus prepared, are put together in a frame, and placed parallel to each other in the usual way, as they are done for rolling or flatting. He then passes such rolled or flatted metal between the said rollers, and by compression produces the figure, form, and size, intended. The next part of the process is in dividing, or separating the wires from each other, which is performed by the use of slitters, nearly similar to such as are used for slitting iron into rods, or he can separate them by circular or lever sheers, or by tools worked in a fly press, or by rollers inverted, or by other methods described in the specification.

To CHARLES PLINTH, of Temple-street, London, for various Improvements in the Construction of a Vessel, Machine, or Cylinder, Reservoir, or Fountain.

The said improvements are made in the vessel, or fountain, into which, in making or manufacturing of waters, or watery solutions, impregnated with fixed air or carbonic acid gas, the said waters or watery solutions are usually put, and the said fixed air or carbonic acid gas, forced by an air-pump or other apparatus for injection, and the whole contents thereof therein agitated by means and methods which are all well known. And the said improvements are, firstly, instead of making, constructing, joining, and connecting, the said vessel, or fountain, in one apparatus along with the said air-pump, and the other vessels for

producing

producing or extricating and supplying the said fixed air or carbonic acid gas, and other matters and things thereunto appertaining; andhe makes and constructs the other vessels, and connects the same with the said air-pump by means of a thimble joint or double screw-piece, or other known means of joining and connecting tubes together, and by and with the intervention of a cock, or other perforated stopping piece, in order that, as soon as the impregnation shall or may have been compleated, he may be enabled to separate the said vessel, with its contents, from the said air-pump, and other vessels. And, instead of bottling, or supplying, the said impregnated fluid by or from a cock, in the usual manner, from the said so as aforesaid improved vessel, or fountain, whether attached to, or separate from, the said air-pump and other vessels, he makes use of a cock, in the upper part of the said vessel, or fountain. And to the outer channel or perforation of the said cock he joins a nozle, adjutage, or tube, upon the principle and in the manner of the fountain commonly used with condensed atmospheric air. And with regard to the delivery of cyder, ale, and other liquids,

from the vessel, or fountain, he effects the same by the introduction of fixed air or carbonic acid gas, which becomes more or less absorbed.

Other Patents lately granted, of which we solicit the Specifications.

JOSEPH HARVEY, of Bermondsey, Str rey, turner; for a machine for better striking and finishing of leather.-August 4. Surrey, brassfounder; for an engine, pump, WILLIAM EDRIDGE, of Rotherhithe, or fire engine. August 4.

JOHN STREET, of Clifton, Gloucestershire, esq. for certain further improvements in the mode of making and working bel lows.-Angust 11.

RICHARD DIXON, of High Holborn, Middlesex, trunk maker; for improvements in the construction of trunks or portmanteaus of various descriptions, and in the application of materials hitherto unused in their construction.-August 11.

JOHN EDWARDS, of Canterbury-buildings, Lambeth, Surrey, gentleman; for a method of preventing leakage in ships, boats, and other vessels.-August 15.

STEPHEN PRICE, of Stroud, Glouces tershire, engineer, for a machine for shearing or cropping woollen and other cloths that may require such process.-Aug. 21.

WE have the satisfaction to adduce

E have the satisfaction to adduce

English Opera, the pending erection of a NEW ENGLISH OPERA-HOUSE, in the Strand, on the scite of the late Lyceum. The first English Opera in this country was established about seven years since by Mr. Samuel James Arnold, and originated in that gentleman's idea, that, while so many thousands were annually lavished upon the Italian Opera, and in the encouragement of exotic talent, it was a disgrace that our native compositions of that species of the drama, should be without their national theatre, and that the genius of our own soil should languish in obscurity and indigence, from the want only of an opportunity of displaying itself. The idea of an English Opera having met the decided approbation of the King, the license was granted under his particular sanction, and by his express command. With such patronage, and with the hopes to which it gave birth, Mr. Arnold embarked his fortunes, and devoted himself to the undertaking, which was to give England a peculiar national

theatre; while continued and increasing success is the best proof how judiciously his efforts have been directed. This success having, however, been much retarded by the inconvenient structure of the old theatre, Mr. Arnold has at length determined to rebuild the Lyceum, and an English Opera House is now rising, in a new, more elegant, and more commodious form, and is likely to prove a theatre worthy of representing so eutertaining and rational a species of our drama. The immense size of the other theatres having been found so much to destroy the effect of the acting, Mr. Arnold has declined to build a larger and more profitable theatre, but has preferred to crect such a one as will tend the most to the entertainment of the public, by introducing no seat in which the spectator will not conveniently enjoy the representation. Magnificence and gaudy splendor are alike banished from the design. Accommodation and convenieuce, facility of ingres and egress, and security against every accident, have been the chief studies of the architects. Simplicity is intended to be the charac

teristie

teristic of its décorations; and all that can be spared by the economy of the architect in the auditory, will be more judiciously expended by Mr. Arnold, for the gratification of the public, on the stage, to make his representations more worthy of the patronage which has hitherto fostered his exertions, and which, it is hoped, will, by its continuance, give success to this extended effort to encourage native talent. The form of the theatre is a portion of an ellipsis, of which the transverse diameter is thirty-five feet, and the distance from the front-boxes is only thirty-eight feet, so that no person will be so far removed from the actors as to require any efforts either to hear or see. It will contain two circles of boxes, with galleries and slips above; and the staircases are so contrived as to prevent the mixture of company in the dress-boxes with those of the upper circles. To give greater facilities to the entrances, and at the same time to make them separate from each other, a new thoroughfare has been opened from the Strand to Exeter-street; in which will be placed the pit and gallery doors, all of which are so contrived that the theatre may be emptied in the space of one minute. From the pit to the street there is no step upward or downward. Large tanks of water, with connecting pipes to every part of the building tend to give it additional security against the danger of fire; while the use of iron, where such material can possibly and properly be placed, renders the want of such assistance unnecessary. The architects to the new theatre are Mr. SAMUEL BEAZLEY and Mr. ALBINUS MARTIN, and the builders are the Messrs. ROBERTSONS.

For the purpose of removing idle prejudices, by the evidence of high authority, we feel it proper to notice, that the interior of Carleton-house has, during the last month, been illumined with gas; and that Guildhall was lighted with gas on the festival of the last Lord Mayor's Day. All the governmentoffices are also illuminated in the same manner; and it is proposed so to light the theatre of the English Opera. No smell, inconvenience, or danger, attends this cheap and elegant process; and it gives us pleasure to learn that it is about to be introduced into Paris, and other great cities on the Continent. The original company in Peter-street have three stations; and they are about to add a fourth near Tottenham-court Road, for Oxford-street and Mary-le-bone. At

present the companies are tardy in their arrangements; and the public are impatient for the extension of the system. The shares in this company are likely to become not less valuable than those in the New River Company.

A new institute is about to be formed for the use of the middle and industrious classes. It is proposed to be called THE MINOR INSTITUTE, and will embrace the several objects of a select English Circulating Library, a Reading Room, and Lectures Literary and Philosophical. The shares will at first be only three guineas, and the subscription less than that of a common circulating library. Prospectuses may be had gratis of various booksellers, and of Mr. Backwell, optician, Long-lane, Smithfield.

Capt. BEAUFORT, is preparing for the press, a concise Account of the Present State of the Southern Coast of Asia Minor, where he was employed in one o his Majesty's frigates.

The fourth volume of Dr. CLARKE'S Travels is printing, and will form the third and last section of Part the Second, of the Travels in Greece, Egypt, and the Holy Land, containing an account of the author's Journey from Athens, by land, to Constantinople, with a description of the North of Greece, Macedonia, and Thrace. It will also be accompanied by a supplement, relating to his Journey from Constantinople to Vienna, and to a visit that he paid to the gold and silver mines of Hungary.

The seventh volume of Messrs. LYSONS' Magna Britannia, containing Cumberland, is in forwardness; as is the seventh part of Britannia Depicta, containing twenty-eight views in Cumberland, engraved from Drawings by J. Farington, esq. R.A.

Major LANDMAN'S Account of Portugal will speedily be completed in fourteen parts, and will consist of historical, military, and picturesque observations on Portugal; illustrated by numerous coloured views, and authentic plans of. all the sieges and battles fought in the Peninsula during the late war. The engravings, about seventy in number, are accurately coloured, from the original drawings of the author.

The Arabian Antiquities of Spain are preparing for periodical publication, by JAMES CAVANAH MURPHY, architect, author of the Description of Batalha, &c. It will be clegantly printed in a large folio volume, and will consist of one hundred engravings by the best artists, from drawings made on the spot by the

author,

author, representing the most remarkable remains of the Spanish Arabs now exist ing in the Peninsula.

Mr. MURPHY intends likewise to submit to the world a History of the Mahometan Empire in Spain, containing a general history of the Arabs, their institutions, conquests, literature, arts, sciences, and manners, to the expulsion of the Moors; designed as an introduction to the Arabian Antiquities, in one volume quarto, with a

map.

D. M. CRIMMIN, esq. of the Middle Temple, has in the press, a new and enlarged edition of Aristotle's Dissertation on Rhetoric, with a copious index.

A third portion is announced of Mrs. MONTAGU'S Letters, with some of the letters of her correspondents, Vol. V. and VI. published by her executor and nephew, MATTHEW MONTAGU, esq.

It merits notice, that the great nuisance of printing offices, the offensive lie in which the pelts of printing balls are usually soaked, is rendered no longer neessary, by the invention of compositionballs, which distribute the ink better than pelts, give no trouble, and cost less. The Monthly Magazine has for many months been printed with these composition-balls, which are made by Mr. FOSTER, of Charles-street, Blackfriars'road; and we learn that they are now in use in the principal offices of the metropolis for all kinds of work. It should, however, be stated, that wet weather tends to decompose them.

An historical and descriptive Account of the Inquisition is in the press, as it has subsisted in different countrics, abridged from the elaborate work of Philip Limborch, professor of divinity at Ainsterdam, and continued by extracts from subsequent writers, political reflections on its revival in Spain, and an historical survey of the Christian church from the earliest ages, in one volume octavo, with engravings.

The Search after Happiness, a pastoral drama, and other poems, by HANNAH MORE, are printing in a small pocket volume.

A continuation to the Flora Londinensis of the late Mr. Curtis, is announced as publishing in monthly parts; the plan of the work is the same as that so successfully adopted in the former series; which was limited to a description of the native plants growing within ten miles of London; the present undertaking has a wider range, and purposes to include all the plants indigenous to

the British Isles. The friends to English Botany will learn, with satisfaction, that Mr. JACKSON HOOKER, has undertaken the superintendance of the descriptions, which will not be confined, as is too often the case, to a mere recital of the different parts of the plant; but whatever may be connected with its history, or tend to illustrate antient authors, or throw light upon neighbouring species, either in our own or any foreign Flora, will find a place in them.

Mr. CARLISLE, in one of his late lectures at the Royal Academy, remarked on the brutal experiments of certain pretended philosophers on living animals. "Animals,” he said, “have too often been cruellysacrificed to a mistaken idea of this practice being useful to this study, the contrary of which, he should prove in the academy. It is a remarkable fact, that the schools of Alexandria, when on the decline, were shamefully addicted to this practice, and, vulgar report says, even sacrificed their fellow creatures for the sake of making observations on vitality. The proper and only true method to obtain anatomical information, is by an inspection of the figure after death."

Mr. ADOLPHUS's long proposed work on the Political State of the British Empire is again announced.

Harold the Dauntless, a poem, is printing, in four cantos, by the author of 'the Bridal of Trierman," to which work it forms a second volume.

On the 7th was performed at DRURYLANE, a new musical farce, called, “My Spouse and I." It contains some pleasing scenes, and the music is lively; some of the melodies cannot fail to become popular. The principal parts were well supported by Bellamy, Harley, Oxberry, Miss Kelly, and Mrs. Bland. -A piece has also been revived at the saine Theatre, from Beaumont and Fletcher, under the title of "The Merchant of Bruges, or the Beggars' Bush:" it was well received, and got up with taste. Yet it must be confessed that it possesses the characteristic dulness of those twin dramatists, and much want of stage effect. Better and more certain remuncration to living authors would render such revivals unnecessary.

Mr. and Miss EDGEWORTH will soon publish Readings on Poetry, a work for young people.

Mr. FABER's new work on the Origin of Pagan Idolatry, ascertained from historical testimony and circumstantial evidence, in three quarto volumes, price,

to