238 New Patents. [March, 



Elementary Illustrations of the Celestial Mechanics of Laplace, 

 comprehending the First Book, for Students, in the Mathematics, may- 

 be shortly expected, in 8vo. 



Mr Wood has in the press the Linnean Genera of Insects, illus- 

 trated by 86 coloured plates, and general observations on each genus. 



Dr. Forbes is about to publish his Observations on the Climate of 

 Penzance, and the Districts of the Land's End. in Cornwall. 



Dr. Henry Reader will shortly publish in 8vo. A Practical Treatise 

 on Diseases of the Heart, in which will be comprised a full Account of 

 all the Diseases of that Organ. 



JUST PUBLISHED. 



Peptic Precepts : pointing put Methods to prevent and relieve Indi- 

 gestion, and to regulate and invigorate the Action of the Stomach and 

 Bowels. 12mo. 3s. boards. 



History and Method of Cure of the various Species of Palsy. By 

 John Cooke, MD. Svo. 6s. boards. 



Monthly Journal of Popular Medicine. By Charles Haden, Sur- 

 geon. No. I. Is. 6d, \ 



Rome, in the Nineteenth Century, containing a complete Account 

 of the Ruins of the Ancient City, the Remains of the Middle Ages, 

 and the Monuments of Modern Times. 3 vols, post Svo. 1/. 7s, 

 boards. 



A concise Account of the Origin and Principles of the new Class of 

 24^-Pounder Medium Guns, of reduced Length and Weight, proposed 

 in 1813 by Sir William Congreve, Bart, and adopted into his Majesty's 

 Service. Svo. 7^. 6d. 



Article XIX. 



NEW PATENTS. 



John Sadler, of Penlington-place, Lambeth, for an improved method 

 or ])rocess of manufacturing carbonate of lead, formerly denominated 

 ceruse, but now commonly called white lead. — Jan. 3, 1821. 



John Leigh Bradbury, of Manchester, for a new mode of engraving 

 and etching metal rollers, used for printing upon woollen, cotton, linen, 

 paper, cloth, silk, and other substances. — Jan. 9. 



Robert Salmon, Esq. for improvements in the construction of instru- 

 ments for the relief of hernia and prolapsis ; which instrument, so im- 

 proved, he denominates scientific-principled, variable, secure, light, 

 easy, elegant, cheap, and durable trusses. — Jan. 15. 



John Frederick Daniell, Esq. of Gower-street, Bedford-square, for 

 improvements in clarifying and refining sugar. — Jan. 15. 



Abraham Henry Chambers, Esq. of Bond-street, for an improvement' 

 in the manufacture of building cement, composition, stucco, or plaster, 

 by means of the application and combination of certain known mate- 

 rials hitherto unused (save for experiments) for that purpose. — Jan. 15. 



Charles Phillips, of Albemarle-street, commander in the royal navy, 

 for improvements in the apparatus for propelling vessels, and improve- 

 ments in the construction of vessels so propelled. — Jan. 19. 



