——■»——— ^f» 



J OUR N A L 



OF 



NATURAL PHILOSOPHY, CHEMISTRY, 



THE ARTS. 



DECEMBER, 180+. 



ARTICLE I. 



Ddfcription of a Tubular Pendulum; having all the Properties of 

 the Gridiron ; but being more compact as ivell as morejieady in, 

 its Motions, In a Letter front Mj-.EdwardTroughton, 

 the Inventor, 



To Mr. NICHOLSON. 

 Dear Sir, 



lliVER fince the commencement of your Journal, I have Advantages of 

 often thought of regiftering therein, the improvements which p^Jj^g^^^^^J^" 

 I frequently make in aflronomical and other inftruments. No philofophical 

 man perhaps had ever a greater antipathy to writing than my- 'P***"^^** 

 felf, and drawn as I am into the vertex of butinefs, and 

 working with my own hands from nin<; to twelve hours in a 

 day, leaves me but little time for literary purfuilsj yet in one 

 who values himfelf on account of the originality of his ideas, 

 it muft feem flothful not to commit them to the prefs, which 

 until that is done, are like flowers or fruit growing fencelefs 

 by the way fide, which every one that pafles by may gather. , 



I always confidered the pendulum of a clock more fui table Pendulums for 



io our ftile of workmanftiip and habits of thinklncf, than to *'*'',^^,^ ^/^. PJ*'^^" 



. ^ ^' cularly fuited to 



tliofe of any other defcription of artJits; and agreeable to this mathematical 

 idea, I have made pendulunjs near twenty years, and 1 own ^°'^*''"^"' 

 Vol. IX. — December, 1804-. Q the 



