Lectures. — List of "Patents for new Lwerd'ons. 375 



rasimns, and Dosithcus patriarch of Jerusalem. The whole 

 forms a volume of" 340 paiies in quarto. 



M.D.Brewster, of Edinburgh, has invented a new an- 

 gular and position micrometer, which serves also for a per- 

 spective micrometer j and a goniometer for measuring the 

 angles of crystals. It also furnishes a method of ascertain- 

 ing the apparent values of all angles seen in perspective, and 

 also their real value, when one of the lines which contains 

 the angle is either a vertical or horizontal line on a level with 

 the eye. We believe this is the only instrument that can 

 measure angles without the observer being at the anoular 

 point, and it has likewise all the properties of the common 

 micrometer. 



LKCTURES. 



Mr. Home's Lectures on the principal Operations of Sur- 

 gery, given gratuitously to the Pupils of St. George's Hos- 

 pital, commence in October, as usual. 



Mr. Gunning, Surgeon to St. George's Hospital, will 

 commence his Lectures on the Principle and Operations of 

 Surgery on Monday, 'the 5th of October, at Eight o'CIock 

 in the Evening, at his house. No. 45, Conduit-street, Ha- 

 nover-square. 



LIST OF PATENTS FOR NEW INVENTIONS. 



To Gordon Howden, of Oxford-street, in the county of 

 Middlesex, Sadler i for a girth pan ncl, whicli most efiVctu- 

 ally prevents the saddle from getting forward upon any de- 

 scription of horses, however much nature may in the shape 

 of the animal work against it. July 20. 



To Charles Lucas Birch, of Great Oueen-street, in the 

 parish of St. Giles in the Fields, in the county of Middlesex, 

 eoachmaker; for improvements in the construction of the 

 roois and upper quarters of landaus, landaulets, barouclrc 

 landaus, barouches, barouchets, curricles, and other car- 

 nages, the upper parts of which are made to fall down. 

 July 21. 



To John Philips, of East Stonchousc, in the county of 

 Devon, stone-mason and sculptor; for his method, or me- 

 thod,, of constructing and removing offices, counting-houses, 

 and other rooms, wiiji ilc^ks, drawing boards, and other si- 

 milar 



