A 



JOFRNAJL 



OF 



NATURAL PHILOSOPHY, CHEMISTRY, 



AND 



THE ARTS. 



AUGUST, 180 6. 



ARTICLE I. 



T 



J)utUne of the principal Inventions by which Timekeepers have 

 . been brought to their present Degree of Perfection. Re- 

 ceived from a Correspondent , : 



JL WO considerable rewards having' been lately granted by The rewards 



the Board of Longitude for improvements in timekeepers * it lately given by 

 . _ .'■ ' ^ . the commissi- 



becomes interesting to science to point out the progress which onevs of Loa- 

 the art of chronometryhas made for some years, and to es- ^1}^*}^'^^^^^^ 

 tablish to the real authors the property of their respective in- chroaome'trical 

 ventions, as far as evidence can be collected from books or ''^^'^®*'^_'';^"* '" '^' 

 credible reports : -And this is the more important to truth, —more especi- 

 because the account of those rewards '.as been publicly stated ^£^,^,.^•^.2]'^"" 

 in terms so positive, and with pretensions so high, that . 

 those unacquainted with the true history might be induced to - 

 think that something attempted in vain before, had been actu- 

 ally performed by those claimants; and that machines had 



* To Mr. Arnold for his father's improvements, and to Mv. 

 lEarnshaw for his own. See Nicholson's Journal, vol, xiii. 



Vol. XIV.— August, I8OG. Nn "now' 



