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William Losh, of Newcastle-on-Tyne, esquire, for improvements in the construction of wheels' for carriages and locomotive engines intended to be employed on railways. April 28;six months.

John Varley, of Colne, Lancaster, engineer, and Edmondson Varley, of the same place, cotton manufacturer, for certain improvements in steam engines. April 28; six months.

Jobo Anthony Tielens, of Fenchurch-strect, merchant, for improvements in machinery or apparatus far knitting. (Being a communication.) April 7; six months.

Marc Carlotti, of Little Argyll-street, Regent'sstreet, gentleman, for certain improvements in the roastruction and manufacture of boots, half-boots, shoes, clogs, and galoshes. (Being a communication.) April 8; six months.

William Falconer, of Clapham-common, gentleman, for improvements in apparatus for attaching buttons and fasteners to gloves, and parts of garwents.

April 13; six months. John Byron Dawes, of Trafalgar-square, CharingCross, gentleman, for a certain improved chemical wow position or compositions, to be employed in the preparation of glass, or other media of light. April 13; sis months.

John Lamb, of Kidderminster, machinist, for improvements in engines to be worked by steam, 211, kas, or vapours, which improvements are also applicable to pumps for raising or forcing water, air, or other fluids. April 15; six months.

Thomas Ricliards, of Liverpool, bookbinder, for certain improvements in the art of book binding, and also in machinery, or apparatus to be employed therein. April 15; six months.

Alfred Jeffery, of Lloyds-street, Pentonville, gentleman, for a new method of preparing masts, spars, and other wood, for ship building and other purposes. April 15; six months.

Cbarles Farina, of Leicester-square, chemist, for a new method of manufacturing soap, candles, and sealing wax. April 15; six months.

Kent Kingdon, of Exeter, cabinet-maker, for certain improvements in impressing and embossing patterns on silk, cotton, and other woven or felted fabries, April 21, six months.

William Noel, of Jermyn-street, St. James's, boot and shoemaker, for certain improvements in the manufacture of boots and shoes. April 21; six months.

Alphonse de Troisbrioux, of Great Russell-street, Bloomsbury, gentleman, for improvements in lithographic and other printing-presses. Being a communication.) April 21; six months.

Otto Rotton, of Gracechurch-street, doctor of medicine, for certain improvements in machinery or apparatus for spinning cotton, wool, silk, and other fibrous substances. (Being a communication.) April 26; six months.

William Wood, of Wilton, carpet manufacturer, for a new mode of weaving carpeting, and other figured fabrics. April 26; six months.

Septimus Cocking, of Birmingham, draftsman, for certain improvements in the production of light by the burning of oil, tallow, and wax, and in the apparatus for regulating and extinguishing the same, (Being partly a communication.) April 26.

Raoul Armand Joseph Jean, Comte de la Charité, chevalier de la legion d'honneur, of Leicester-square, Richard Tappin Claridge, of Weymouth-street, gentleman, and Robert Hodgson of Salisbury-street, Strand. gentleman, for improvements in preparing surfaces of fabrics to be used in covering roofs, Boors, and other surfaces. (Being a communication.) April 26; six months.

Henry Robinson Paimer, of Great George-street, Westminster, civil engineer, for an improvement or improvements in the construction of roofs and other parts of buildings, and also for the a; plication of corrugated plates or sheets of metal :o certain purposes for which such sheets or plates have not heretofore been used. April 26; six months.

Joseph Mege, of Keppel-street, Russell-square, merchant, for improvements in the making or constructing of trowsers. (Being a communication.) April 26 ; six months.

John Henry Pape, of Grosvenor-street, Bondstreet, pianoforte maker, for improvements in carriages and in the construction of wheels. April 28; six months.

LIST OF PATENTS GRANTED FOR SCOTLAND

BETWEEN 22ND OF MARCH, AND 22ND OF APRIL, 1842. Moses Poole, of Lincoln's Inn, in the county of Middlesex, gentleman, for improvements in the manufacture of plaited fabrics. (Being a communication from abroad.) Sealed March 29.

James Hunt, of Whitehall, in the county of Middlesex, gentleman, for improvements in the manufacture of bricks. March 29.

James Hall, of Glasgow, upholsterer, for improvements in beds, mattrasses, and apparatus applicable to bedsteads, couches, and chairs. March 30.

John Harwood, Esq., of Great Portland Street, in the county of Middlesex, for an improved means of giving expansion to the chest. April 6.

James Andrew, of Manchester, in the county of Lancaster, manufacturer, for certain improvements in the method or process of preparing or dressing yarns or warps for weaving. April 6.

Edmund Morewood, Esq., of Winchester-buildings, Great Winchester-street, in the city of London, for an improved mode of preserving iron and other metals from oxydation or rust. (Being a communication from abroad.) April 7.

Henry Booth, Esq., of Liverpool, for improvements in the method of propelling vessels through water. April 13.

William Brockedon, of Queen-square, in the county of Middlesex, gentleman, for improvements in the manufacturing fibrous materials for the cores of stoppers to be coated with India rubber, and used for stopping bottles and other vessels. April 13.

Christopher Nickels, of the York-road, Lambeth, in the county, of Surrey, gentleman, for improve. ments in the manufacture of plaited fabrics." April 13.

James Smith, of Deanston-works, in the parish of Kilmadock and county of Perth, cotton-spinner, and James Buchanan, of the city of Glasgow, merchant, for improvements applicable to the preparing and spinning of cotton, wool, flax, hemp, and other fibrous substances. April 13.

Mathias Nicolas La Roche Barré, of St. Martin'slane, in the county of Middlesex, manufacturer of cotton, for an improvement in the manufacture of a fabric applicable to sails and other purposes. April 19.

Reuben Partridge, of Cowper-street, Finsbury, in the county of Middlesex, engineer, for certain improvements in machinery or apparatus for splitting and shaping wood into splints, for the manufacture of matches and other similar forms. April 20.

Richard Dover Chatterton, of Derby, in the county of Derby, gentleman, for certain improvements in propelling. April 22.

Theophile Anton Wilhelm, Count de Hompesch, of Burich Castle, near Aix-la-Chapelle, in the kingdom of Prussia, for improvements in obtaining oils and other products from bituminous matters, ani in purifying or rectifying oils obtained from such malters. April 22.

NOTES AND NOTICES. Birkbeck Testimonial.-A Public Meeting was held at Freemasons' Hall on Monday last, LORD BROUGHAM in the Chair, when it was resolved, 1.

That “this meeting desire to record their deep it is one of the most important improvements or sense of the eminent services which Dr. Birkbeck the age, and must produce an entire revolution in has rendered to the education of the people, by the trade affected by the invention.- Le Cros. founding in 1800, and teaching a class for mecha Jeffrey's Adhesive Composition, some remarknics at Glasgow, by his munificent AID IN FOUND able experiments made with which at Woolwich, ING, and his constant care in superintending the were noticed in our last (No. 976,) is now stated to London Mechanics' Institution, and by his ready consist simply of shell lac and caoutchouc dissolved assistance in forming similar bodies throughout the in naphtha in certain proportions. The cost is kingdom." And 2, That "the most fitting method about half that of common glue. of testifying the public gratitude to Dr. Birkbeck, The Earl of Rosse's Gigantic Speculuni, the eastis by founding in University College, London, a ing of which was noticed in our last Number, is Professorship of Machinery and Manufactures, in stated by Sir James South, in a letter to the Tiner, cluding the application of Chemistry and other to weigh about 3 tons, to be 6 feet in diameter, 5) branches of Natural Philosophy to the Arts, (the inches thick at the edge, and 5 inches at the centre, Professor to lecture in the country during the Col and to present a reflecting surface of 4071 square lege Vacations), and that a subscription be com inches, whilst that of the celebrated Herschel tele menced for this purpose."

The second resolution scope had but 1811. It is to be fitted into a telewas opposed by Mr. Hodgkin, Mr. Fogo, and some scope of 30 feet focal length, but it is not expected other gentlemen, who seemed to think that the to be cool enough for removal till after the lapse of endowing of a Professorship in a College inaccessi a couple of months. The metals of which the ble to mechanics, was not the most appropriate speculum is composed, are copper and tin, 126 parts mode that could be imagined, of perpetuating the of the former to 57% of the latter. The foundry remembrance of Dr. Birkbeck's services to de where the casting was made is close to Birr Castle, chanics' Institutions; but the promoters of the the residence in Ireland of the Earl of Rosse, and, meeting had previously settled the matter other with the exception of the crucibles, which were wise, and so the resolution passed in the affirma made by Messrs. Dewer, of Old-street, St. Luke's, tive. The words in the first resolution, which we all the apparatus employed on this interesting oceahare marked in small capitals, will strike all who sion (the steam-engine itself included) was made in are acquainted with the actual history of Mecha workshops adjoining the Castle, under the Earl nics' Institutions, as remarkable. The time has immediate directions, by workmen trained and inbeen, when the Noble Lord who presided on this structed by himself. occasion, went a great way farther. May we flatter New Egyptian Lighthouse.--Mehemet Ali, with ourselves that his Lordship has discovered that well the view of facilitating the commercial intercourse merited honour to the dead, is not inconsistent with between his country and Europe, has caused a new justice to the living ?

lighthouse to be erected on Point Eunootos, dear American Stave-cutting Machine.-A machine his palace at Alexandria. The tower is of stone, has been lately invented that will dress at one and 180 feet high; the lantern (supplied from Eng. operation, a rough board, or rived stave of any kind land, by Messrs. Wilkins and Son) consists of 13 of wood, into a perfect stave for the cask, giving it lamps, with parabolic reflectors. The light, which on both sides the round of the cask, and jointing it was first exhibited on the Ist inst., can be seen to its proper level and taper, at the rate of one from a distance of 20 miles at sea. The structure hundred per minute, and will do the work of 100 was designed by, and has been executed under the men. It is said to be very simple, not likely to get superintendence of our countrymen, the Messis. out of order, and can be built at small expense. Galloway. There is one in operation at 103, Murray-street, The indostan Steamer.- A magnificent steamer, New York. A patent was recently obtained in Eng of 1800 tons burden, to be called the Hindostan, bas land, for the manufacture of staves, the preparation been built by Messrs. Wilson, of Liverpool, for the of which is said to be so simple, and so effectual, as to Oriental Steam Navigation Company, and is in. promise a revolution in this most important branch tended to ply between Suez and Calcutta direct, of cooperage. An American invention of this cha calling at Aden, and Point de Galle in the island of racter, called the “ Patent Rotary Stave-cutting Ceylon. It is hoped that when the Hindostan gets Machine," and one possessing many advantages fairly at work, the whole distance from England to over that used in England, is now in successful Calcutta will be performed in 30 days; and if she operation in this country. The superiority of that equals the Oriental and Great Liverpool in swiftness used in the United States, is demonstrated by the and strength, the hope will be realized. Though fact, that it is more simple in its construction, is Jarger than the Oriental, the Hindostan is on premanaged with more facility, and throws off, in the cisely the same plan; and another steamer, of the same length of time, a larger amount of finished same size and construction, to be called the Benstock. The two machines operate alike in cuting tinck, also intended for the line from Suez to Calleaves from solid blocks of wood, previously steam cutta, is likewise in progress. It will be no small ed for the purposes of softening and seasoning. In honour to Messrs. Wilson, and to the port of Liverboth, the waste steam of the engine is used for this pool, to have furnished the steamers for the longest purpose. In both, at the expense of but two or line of steam communication in the world, and to three horses power, the wood is cut like cheese, have supplied vessels not to be surpassed by any without offering any apparent resistance to the port or any builder in Europe.--Liverpool Times. knife, and without the slightest waste in saw-dust, shavings, or chips. In the English patent, the leaves cut from the block are passed through two

KF INTENDING PATENTEES may be supplied machines, to bring them to the required shape for gratis with Instructions, by application (postthe cask intended. In this operation, it most es paid) to Messrs. J. C. Robertson and Co., sentially varies from the American patent. This,

166, Fleet-street, by whom is kept the only at one movement, cuts out the stave in the curved shape, chamfers, crozes, and pares the ends; the COMPLETE REGISTRY OF PATENTS EXTANT last three processes mentioned requiring a separate (from 1617 to the present time). Patents, both labour of hands in the English manufacture of the British and Foreign, solicited. Specifications stave. In the operation of the American patent, it is apparent there must be a great saving of time, prepared or revised, and all other Patenl boxlabour, and expense. In the science of mechanics iness transacted,

LONDON: Edited, Printed, and Published by J. C. Robertson, at the Mechanics' Magazine Office,

No. 166, Fleet-street.- Sold by W. and A. Galignani, Rue Vivienne, Paris;

Macbin and Co., Dublin; and W. C. Campbell and Co., Hamburgh.

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ROBERTS's GALVANIC BLASTING APPARATUS. We mentioned briefly in a recent num

Wilson, who remained in the bed of the ber, (Notes and Notices, No. 975,) a quarry; the assistant at the battery brought successful application, at Wester Craig's

the discs in contact, and the whole face of Quarry, near Glasgow, of a mode of

the rock was riven asunder, from top to blasting rocks by galvanism, invented by

bottom, and from 300 to 400 tons of stone

were torn from the hill, and came thunder. Martyn J. Roberts, Esq., F. R. S. E. The following very graphic description

ing down like an avalanche. It is impossible

to imagine any thing more grand or interest. of the operation, from the pen of an eye ing than this triumph of science as applied witness, has since appeared in the news

to practical utility, in rendering a hitherto papers :

most dangerous process perfectly safe and “ The workmen, under the direction of simple in exeeution." the superintendant of the quarry, had nearly Mr. Roberts has himself addressed : completed their part of the operations be long and very able letter on the subject fore Mr. Roberts, (the inventor,) and Mr. Wilson, made their appearance, accompanied

to the Highland and Agricultural Society

of Scotland; and to this letter we are ioby assistants, with the battery and connect

debted for the following explanatory paring wires for conveying the galvanic current

ticulars, as well as for the accompanying to the charges of powder. These gentlemen carefully superintended the placing of the

engravings. Persons desirous of adopting, charges in the rock, and connecting the

in their quarrying or engineering prac. main coils of wire with the cartridges.

tice, Mr. Roberts's process, will do well

, When the arrangements were completed, however, to consult the pamphlet itself, and it was observed that the battery was which goes much more into detail than placed on the top of the precipice over the our limits will permit us to do. quarry-whence the distance to the charges The present, or what we may hope to be fired was shortest, and entirely free soon to call the old process of blasting from danger-the spectators, by Mr. Ro. rocks with gunpowder, is described with berts's advice, placed themselves on the truth, by Mr. Roberts, as being at once summit of the precipice, and at the outside troublesome, expensive, and dangerous. of the curved line of the rock, from which

The quantity of powder fired on one ocan excellent view could be obtained of the

casion, at Craig Leith, near Edinburgh, effects. The two charges at the foot of the rock were first to be fired ; and having been

amounted to no less than 500 lbs.; and uncertain where I should place myself, I was

loss of life or mutilation of limb, from in the act of moving from east to west along

premature explosions, is a matter of althe top of the precipice, when the signal was

most daily occurrence. given while I was immediately behind and

Mr. Roberts's improved process conclose to the battery, at the moment the two sists, first!y, in a new method of tampgalvanic poles were brought together. The ing; and, secondly, in using the electric effect was instantaneous.

The hill upon

fluid to fire the charge of gunpowder, in which I stood was shaken to its foundation, a safer, more effectual, and cheaper way as by an earthquake, and the riven mass of than any heretofore attempted. rock went crashing down into the depths of

1. Of the Tamping. This was startling and beautiful, but fell far short of what took place tamping is based upon the curious fact

The improvement in the method of upon the second application of the galvanic current to the two charges placed over each

that if a tube of small diameter and mo. other in the face of the perpendicular cliff.

derate length be filled with dry sand, po A short time was required to remove the

force that can be applied at one end will scaffold that had been used by the workmen press out the sand at the other. Instead in preparing the two upright blasts, and in of ramming down a quantity of gravel placing the connecting wires, and applying and broken stones into the bore-hole, screens in front of the charges to prevent (and this with considerable danger to the the scattering of the splinters of stone when workmen) Mr. Roberts finds it sufficient the explosion took place; these arrange that dry sand is gently poured into the ments gave me sufficient time to gain an ex hole until a colump of sand is formed of cellent position for observation. Every thing about 12 inches in depth ; though if the was at length completed, and every eye then was fixed, and the breath held in anxious

• Longman and Co., London; Grant and Son, suspense; then came the ready' from Mr. Edinburgh.

the quarry

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hole will admit of its being filled to a construction, that the benefits to be degreater depth, so much the better. Mr. rived from it might be accessible to all ; Roberts believes that many hundred. and after a great sacrifice of time, and weights of gunpowder would be required the expenditure of a considerable sum of to blow out a column of sand 2 inches in money, he had the satisfaction of perfectdiameter, and 18 or 20 inches in depth, ing it to such a degree, that any carpenplaced in a solid rock. In all the expe ter can now make it, and every workman riments he has made upon blasting rocks, use it with success. Experiments were (and they are not few,) the sand has not made with it on blasting rocks and firing in any one instance been blown out, pro charges under water, in the presence of vided it was perfectly dry, and that its a deputation from the Highland Society, depth exceeded 15 inches when the dia and these gentlemen, distinguished for meter of the column was under 2 inches. their scientific attainments, expressed The danger of tamping by the ordinary their unqualified approbation of the remethod is thus avoided; for no rammers sult. After this, Col. Pasley applied or stones are required, and much pecu. a galvanic apparatus to the firing of niary loss attending the old plan is saved. charges under water, but, from the want

of a full description of Mr. Roberts's im2. Of the Electric or Galvanic Agency. proved apparatus, and method of firing

It has long been known that gunpow charges simultaneously, he did not meet der can be fired by the electric fuid. In with constant success. the earlier days of electric science it was Mr. Roberts makes use of a galvanic accomplished by Franklin, who generated battery similar to that of Professor electricity for the purpose by the common Daniell, (whose employment of sulphate glass electrical machine. At a later pe of copper to excite the plates, instead of riod, an attempt was made to apply elec diluted sulphuric, nitric, or muriatic acid, tricity thus produced to the firing of he characterizes as “a discovery" of charges in blasting rocks, but it failed; great importance, by which the progress for, in consequence of the high tension of electrical science has been more faciof this electricity, extraordinary precau, litated than by any since the days of Sir tions were necessary to confine the Auid Humphrey Davy:) but he substitutes to its proper channel-namely, the con for the earthen or glass jars a wooden ducting wire-perfect insulation of this box, divided into compartments by waterwire being necessary to prevent the elec tight divisions, as represented in fig. 1 of tricity flying off to the surrounding earth. the engravings on our front page. To Dr. Hare, the American philosopher, see avoid the danger which would attend a ing the inapplicability of this method of close proximity to the apparatus on obtaining electricity, suggested the use of bringing the positive and negative poles the galvanic battery for the purpose, but into eommunication, (supposing the wires his apparatus was so cumbrous, at least to be immersed in gunpowder,) Mr. Roso ill adapted for every-day use by un berts has contrived an addition to the scientific workmen, that his plan was apparatus, whereby the poles are connever more than very partially adopted. nected by pulling a string, which may About two years ago, Mr. Roberts being be of any required length, so as to enable in a neighbourhood where quarrying and the operator to station himself out of the mining are carried on to a great extent, reach of all danger. his attention was called to the subject by A wooden upright A, about 9 inches long the distressing accidents that daily oc and 2 inches square, is fastened to each end curred in the process of blasting, and he of the frame, and a round wooden cross then contrived an apparatus for blasting bar, B, an inch in diameter, connects the by galvanism, which was found very ef tops of these uprights (fig. 1.) A disc ficient, and was approved of by the of tin, D, about 3 or 4 inches in diameter, Members of the Royal Geol. Soc. of and having a hole an inch in diameter Cornwall, before whom he read a paper in its centre, is soldered to the wire aton the subject, afterwards published in tached to the zinc plate of the first pair the Transactions of that Society. But, (the negative pole): this disc is fastened as there was some trouble connected with to the upright at this end of the battery, the use of this apparatus, Mr. Roberts the round cross-bar passing through the afterwards endeavoured to simplify its central hole. As the disc is in metallic

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