A 



JOURNAL 



OF 



NATURAL PHILOSOPHY, CHE.MISTRY, 

 THE ARTS. 



JUNE, 18 06'. 



ARTICLE I. 



Letter of Tnqninj from a Correspotidcnt, respecting the sponta- 

 neous Rccvceri; of the Edge in dull Razors laid aside for 

 a time; and a Postscript, shewing that Lavoisier has no 

 title to the Discovery of the Modern Theory of Oxidation : 

 uith a Reply and some Remarks by W. N. 



To Mr. NICHOLSON. 

 SIR, 



-jpj Edinburgh, -iOth May, 1805. 



JljIaVING often remarked that a razor which by use had A dull razor 

 , . , , , . , , , . • , 1 recovera its 



lost Its edge, and was hud by, recovered it again when newly edge by being 



Strapped ; I have been in the h<il)it for some time past of put- laid aside for » 

 ting my razor aside for a short time when it became dull, with 

 the view of improving its power of cutting. I iiave asked some 

 experienced hair-dressers who arc much in the habit of shav- 

 in25, if they had ever noticed the fact, and received an answer 

 in the affirmative : and on inquiring a few days ago of a sur- 

 geons' instrument maker of this place, whether he could tell 

 me the cause, he replied that the same question was more than 

 once put to him by the late Dr. Black, but that he was unable The same fact 

 to give any satisfactory answer. If you should deem the ob- "t^ei^s, and by 

 Vdl. XIV. — JuxE, 1806. N scrva- Dr. Black. 



