JOURNAL 



OF 



NATURAL PHILOSOPHY, CHEMISTRY, 



AND 



THE ARTS. 



JUNE, 1801. 



ARTICLE I. 



Outlines of EKperlments and Inquiries refpeBing Sound and Light. Sj TbOXAS YoVSGf 



M.D. F.R.S. 



{^Continued from page 78.) 

 IV. Of the Vehciiy of Sound. / 



T 



AT has been dcmbnftrated, by M. de la Grange and others, that any impreflion whatever 

 communicated to one particle of an elaftlc fluid, will be tranfmltted through that fluid 

 with an uniform velocity, depending on the confl;itutIon of the fluid, without reference to 

 any fuppofed laws of the continuation of that impreflion. Their theorem for afcertaining 

 this velocity is the fame as Newton has deduced from the hypothefis of a particular law o£ 

 continuation : but it muft be confefl!ed, that the refult differs fomewhat too widely from 

 experiment, to give us full confidence in the perfedion of the theory. Correfted by the 

 experiments of various obfervers, the velocity of any impreflion tranfmitted by the com- 

 mon air, may, at an average, be reckoned 1 130 feet in a fecond. 



V01..V.— June 1801. M V. Q^ 



