cessful practice of the invention comes into his mind; he finds it will answer, and introduces it into his specification. Now it can only be upon a very strict technical rule, that such addition in the specification to what was passing in his mind when he applied for the patent would render that patent void. It has been held, that if a man applies for a patent for two things, and he is not the inventor of one, or there is some objection to one of them, the whole is void, because it is considered that he made an unfair representation, and obtained a patent unfairly thereupon; and if any one part fails, the whole is to fail also. That appears to me to be only a technical rule, intended to prevent frauds in obtaining patents, or for some other reason, but there is no reason why it should be carried farther than it has been. For the same reason, if any part of the specification is bad from any cause, it may render the whole void. In this case no deception was practised on the crown; the inventor professed to give a gas apparatus, and has done so; nor is any deception practised on the public, for until the enrolment of the specification, the public were unacquainted with the mode in which the invention is to be carried into effect. At first it was merely floating in his mind, but his mind having got into an improving state, is able to give an improvement of a certain value when he petitions the crown for a patent; afterwards, as he puts up the machine, to try if it will answer, and to see that the intended specification will be right, he finds from day to day how to increase the original value, perhaps to double it; surely it would be a hardship, if for thus giving the public a double mode, and adding (when he ascertains the patent) an improvemement of double the value of that which was passing in his mind when he appled for his patent, that the whole should be void, and that he should be deprived of the benefit, because he had not in his specification confined his communication to what was passing in his mind at the time his patent was sealed. I think that would be very unjust, and I know of no rule of law by which it should be.

Felton against Greaves. An action for infringement of Felton's Patent of 1827, for a machine for sharpening Knives, Seissors and Razors. Tried in the King's Bench 6 June 1829, before Lord Tenterden. Patentee nonsuited.

The description in the specification was judged incomplete because it would not enable persons to make a machine for sharpening scissors.

Scotch Patents.

List of Patents granted in Scotland from 20th December, 1830, to 4th March 1831.

To Thomas Walmsley, of Manchester, manufacturer, for the invention of improvements in the manufacture of cotton, linen, silk, and other fibrous substances, into a fabric or fabrics applicable to various useful purposes.-Dec. 20,

To Charles Stuart Cochrane, of Great George Street, Westminster, Esq. a Commander in the Royal Navy, for the invention, communicated to him by a foreigner residing abroad, of certain improvements in the preparing and spinning of cashmere wools.

To Robert Dalglish, jun. of Glasgow, calico-printer, for the invention of improvements in machinery or apparatus for printing calicoes and other fabrics.

To John Hall, jun. of Dartford, in the county of Kent, engineer, for the invention, communicated to him by a foreigher residing abroad, of a machine, upon a new and improved construction, for the manufacture of paper.-Dec. 28.

To William Needham, of Langour, in the county of Stafford, gentleman, for the invention of certain improvements in machinery for spinning, doubling, and twisting silk, and other fibrous substances.-Jan. 14.

To Francis Molineux, of Hampstead, in the county of Middlesex, gentleman, and William Bundy, of Kentish Town, in the same county, engineer, for the invention of certain improvments in machinery for spinning and twisting silk and wool, and for roving, spinning, and twisting cotton, flax, hemp, and other fibrous substances.-Jan. 18.

(In place of a former one) To John Ericsson, of the New Road, London, engineer, for the invention of an improved engine for communicating power for mechanical purposes.

To Samuel Clegg, of No. 16, Sidmouth Street, Gray's Inn Lane, in the county of Middlesex. civil engineer, for the invention of an improved gas-meter.-Jan. 19.

To Thomas Bulkeley, of Upper Gloucester Street, New Road, in the county of Middlesex, doctor of medicine, for the invention of a method of making or manufacturing candles.-Feb. 2.

To James Thomson, of Spencer Street, Goswell Street Road. in the county of Middlesex, gentleman, for the invention of certain improvements in making or producing printing types.Feb. 18.

To Richard Roberts, of Manchester, in the county of Lancaster, civil engineer, for the invention of a certain improvement or certain improvements, in the mechanism employed to render selfacting machines, known by the name of mule, billy, jenny, jack frame, or stretching frame, and all machines of that class, whether the said machines be used to rove, slub, or spin cotton, or other fibrous substances.

To Augustus Graham, citizen of the United States of America, bnt now residing in West Street, Finsbury, in the city of London, gentleman, for an invention communicated to him by a foreigner residing abroad, of certain improvements in the application of springs to carriages.

To William Wedd Tuxford, of Boston, in the county of Lincoln, miller, for the invention of a machine or apparatus for cleansing or purifying wheat, grain, or other substances.

New Patents Sealed, 1832.

To George Vaughan Palmer, of the parish of St. Swithen's, Worcester, artist, for his having invented certain improvements in machinery or apparatus for excavating, and which he calls an excavating and self-loading cart.-24th January.-6 months.

To Joseph Maybury, John Maybury, and Joseph Maybury the younger, of Belton, in the county of Stafford, iron masters, for their having invented certain improvements in polishing or planishing, and manufacturing or

making of ladles, spoons, and other articles for culinary, domestic, and other purposes, made of iron and tinned. -24th January.-2 months.

To James Perry, of Red Lion Square, in the county of Middlesex, bookseller and publisher, for his having invented an improvement or improvements in or on pens. -28th January.—6 months.

To John Jellicorse, of Stansfield mill, in the county of York, for his having invented and found out certain improvements in spinning machinery.-28th January.— 2 months.

To William Lloyd Wharton, of Dryburn, in the county of Durham, Esq. for his having invented certain improvements in engines for raising or forcing water by the pres sure and condension of steam.-30th January.-2 months.

To Collin Smith, of Great St. Helens, Bishopsgate, in the city of London, merchant, in consequence of a communication made to him by a certain foreigner residing abroad, for an invention of an apparatus or machine for regulating the course and action of fluids and liquors, which apparatus or machine is applicable to various purposes. 31st January.-6 months.

To Thomas John Fuller, of the Commercial Road, Limehouse, in the county of Middlesex, civil engineer, for his having found out and invented a new or improved mode or process for raising water or other fluids.—31st January.-6 months.

To William Church, of Bordsley Green, near Birmingham, in the county of Warwick, Esq. for his having invented or found out certain improvements in apparatus to be employed in the transportation of goods or passengers, parts of which said improvements are also applicable to the ordinary purposes of steam-engines.-9th February -6 months.

To John Ericsson, of Liverpool, in the county palatine of Lancaster, civil engineer, for his having invented or found out an improved engine for communicating power for mechanical purposes.-9th February.-6 months.

To John Heathcoat, of Tiverton, in the county of Devon, lace manufacturer, for his having invented or found out a method or methods of ornamenting, embroidering, or working devices upon lace, net, and other fabrics. -16th February.-6 months.

To John Sutton Nettlefold, of Red Lion Street, Holborn, in the county of Middlesex, ironmonger, for his having invented an improvement or improvements in table furniture, applicable to other purposes.-16th February. -6 months.

To George Solomons and Elias Solomons, of Bedford Square, in the parish of Stepney, in the county of Middlesex, opticians, in consequence of a communication made to them by a certain foreigner residing abroad, for an invention of improvements in preparing certain transparent substances for spectacles and other purposes.— 16th February.-6 months.

To Richard Atkinson, of Huddersfield, in the county of York, woollen-cloth manufacturer, for his having invented or found out an improved machine or method for raising or brushing woollen-cloths and other goods.-16th February.-6 months.

To William Church, of Heywood House, Bordsley Green, near Birmingham, in the county of Warwick, gentleman, for his having invented or found out certain improvements in machinery for making nails.-25th February.-6 months.