A 



JOURNAL 



O F 



NATURAL PHILOSOPHY, CHEMISTRY, 



AND 



THE ARTS. 



jiUGusr 1799. 



ARTICLE I. 



Supplement to the Paper on the Pbilofophlcal Ufes of a Common Watch, By the Rev, W, 



FEARSONt of Lincoln, 



TO MR. NICHOLSON. 



SIR, 



A. 



-S the paper " On the Philofophical Ufes of a common Pocket Watch," which I fent 

 you, was deemed fufficiently important to be inferted in your Journal, I am induced to tranf- 

 mit to you fome additional numbers, fuitable for a watch that may indicate hours, minutes, 

 feconds, and quarters of a fecond, witliout any extra-wheel work ; in order that, out of the 

 different varieties, the watch-maker may feledt fuch numbers as are already marked upon the 

 plate of his engine ; for I underftand that 64, one of the numbers propofed for a new 

 watch, though as eafily divided as any other number, is not ufually put upon the cornrnpflt 

 plates of watch-makers. — That th^ different pra<£licable varieties may be exprefled in as con- 

 cife a manner as is confiftent with perfpicuity, I will divide the whole train of a watch into 

 three portions: that part which comprehends the fufee, the great wheel, and its pinion, may 

 be denominated the firft portion; the fecond portion may be the centre wheel, with the 

 pinion which it a<3:uates, and the third wheel with the pinion ^duated by it, which is placed 

 V«L. III.— August 1799. C c on 



