72 ON TH1 GRAVE HARMONICS. 



on the fame principles might, perhaps, be found convenient 

 in private houfes, if introduced between the parlour and fome 

 other room appropriated to the ufe of domeftics. Directions 

 might then be given to a fervant without his entering the 

 room, and in whifpers too low to difturb the company. 



I am, 

 SIR, 



your's refpeclfully, 



EZEKIEL WALKER. 

 Lynn Regis, Jan. 19, 1803. 



ERRATA. 

 Vol. IV. p. 40. in the firft col. of the table, for 1, %, z, 4, read J, z, 3, 4. 

 P. 43. line 12, for long rend large. 

 P. 43. line 19, for, In this manner, read Thus. 



III. 



Obfervations in Reply to Mr. Gov g a* s Letter on the Grave 

 Harmonics*. In a Letter from Thomas Yovng, M.D. 



f.R.S. Sfc. 



S I R, 



To Mr. NICHOLSON. 



It is the opinion XxT length Mr. Gough has accepted my invitation, and has 



Aegr!™har- hatadverted to the P henomena of the g rave harmonics. Thefe 

 monies are not founds, he thinks, are merely mental and imaginary ; I fup- 



therefultsof pofe them real and material ; Lagrange, whom I have already 

 pagination. , ■, . r >, r •• , , m T , , , 



quoted, is of the lame opinion ; and while I have the autho- 

 rity of a man who is allowed to be either the firft or fecond 

 phyfical mathematician in Europe, I mall be very unwilling 

 either to difbelieve my ears, or to confefs that Mr. Gough has 

 convicled me of error. 

 DeveTopement To (hew that I have not advanced a theory fo new as Mr. 



tharta tto° ry by Gou S h has deemecl fc * flla11 <l uote a parage from the firft 

 volume of the Mifcellanea Taurinenfia. " We have feen," 

 fays Lagrange, " that the particle of air which is found in a 



* Philofophical Journal, IV. page 1. 



place 



