[ n ] 



An Account of Jome Experiments on WHEEL CARRIAGES. 

 In a Utter from RICHARD LOVEL EDO WORTH, Efq-, 

 M.R.LA. and F.R.S. to the Rev. Doaor HENRY USSHER, 

 M. R. I. A. and F. R. S. 



Dear Sir, 



X OU may, perhaps, have experienced what I now feel in Read March 

 fitting down to write upon a fubjed that is not hkely to be ' ' * 

 interefting to many readers, and that is of fuch familiar ufe as 

 to promife neither novelty nor material information. People 

 imagine that they are intimately acquainted with what they 

 have been long accuftomed to fee ; and the mind feels averfe to 

 that retrograde motion which leads it back to firft principles, 

 when it neither fears error nor expeds difcovery. 



The notes from which the following paper is compofcd 

 have lain by me for fome years, and the confiderations which 

 I have juft mentioned have continually prevented me from 

 drawing them into a conneded form for publication ; but what 



L appears 



