“Whereas His present most Excellent Majesty King George the Third, by His Letters Patent under the Great Seal of Great Britain, bearing date at Westminster, the Fifth day of February, in the twenty-fourth year of His reign, reciting that I, the said Joseph Cartledge, had, by my Petition, humbly represented unto His said Majesty, that I had, by great study, invented “A NEW METHOD OF GLAZING EARTHENWARE,” which would be of public utility and advantage, and praying His said Majesty to grant unto me, my e[~x]ors, adm̃ors], and assigns, His said Majesty’s Letters Patent for the sole exercise of my said Invention, within England and Wales, and the Town of Berwick-upon-Tweed, for the term of fourteen years from the date of the said Letters Patent, was graciously pleased to condescend to my request; in which said Letters Patent is contained a proviso that if I, the said Joseph Cartledge, should not particularly describe and ascertain the nature of my said Invention, and in what manner the same is to be performed, by an instrument in writing under my hand and seal, and cause the same to be inrolled in his said Majesty’s High Court of Chancery within four calendar months next and immediately after the date of the said Letters Patent, that then the said Letters Patent, and all liberties and advantages whatsoever thereby granted, should utterly cease, determine, and become void, as in and by the said Letters Patent, relation being thereunto had, may and will more fully appear. “NOW KNOW YE, that I, the said Joseph Cartledge, in compliance with the said proviso, do hereby describe and ascertain the nature of my said Invention and in what manner the same is to be performed, as follows, viz.:-- “First, as to the nature of the Invention, it is well known to the manufacturers of earthenware, that all the sorts of common ware now in use are now, and have been heretofore at all times, both in this and all other countries I know, glazed either by sea salt, or by lead ore, or by some preparation of lead, or of lead and tin united to ground flints or clay, or both. Now the nature of the discovery which I have made consists in this, that instead of the use of sea salt, or metallic substances, the earthenware is glazed with various kinds of earths and stones, by which there will be a great saving of expence in the glazing of the said ware, and the glaze itself, it is apprehended, will be more perfect than that which is made with salt, and more wholesome than that into which either lead, or lead and tin, enter as constituent parts.