156 New Patents. [Fes, 



complicated cases, the means of verifying which he will also find 

 in the Memoirs of Coulomb. 



OPTICS. 



In giving an account last year of the researches of MM. 

 Malus and Arago, on various phenomena of optics, we an- 

 nounced that in reporting experiments so new and so delicate, we 

 would make a point of detailing them with the greatest fidelity, 

 and in the very words which the authors themselves employed. 

 After this advertisement which we repeat for what is to follow, 

 we shall obviate an objection that may be made against us. It 

 will be said perhaps that we have somewhat exceeded the bounds 

 of a simple notice. But we beseech our readers to consider that 

 we have to give an account of objects quite new, and of apparatus 

 which could not otherwise be understood so as to be able to re- 

 peat the experiments; though this must be an object with more 

 than one philosopher. We shall avoid algebraic formulas as 

 much as possible. Those that we give are short. If we had ex- 

 pressed them in words, our language would have appeared very 

 extraordinary, and it would have been less intelligible, and much 

 more inconvenient for all those who will take the most interest 

 in this new theory, 



{To he continued.) 



Article XIL 

 New Patents. 



Henhy Osburn, of Bordesley, near Birmingham, in the 

 county of Warwick ; for a new method of welding and making 

 various kinds of cylinders of iron and steel. Dated November 

 28, 1812. 



Charles Price, of the Strand, in the county of Middlesex, 

 umbrella maker; for a parasol and umbrella on an improved 

 construction, which he denominates " The improved Solumbra.*' 

 Dated December 4, 1812. 



Samuel Smith, of Coventry, in the county of Warwick, 

 watch-maker ; for an improved escapement for watches, by an 

 invention calculated to make them beat dead seconds from 

 principle, and parts of seconds, by means of clock pallets 

 attached to a lever, operating on a vertical wheel. Dated 

 December 9, 1812. 



Robert Were Fox, the younger, of Falmouth, in the 

 county of Cornwall, merchant ; and Joel Lean, the younger, 

 of the parish of Budock, near Falmouth aforesaid. Gentleman; 

 for their certain improvements on" steam-engines, and the appa- 



