A 



JOURNAL 



OF 



NATURAL PHILOSOPHY, CHEMISTRY, 



AND 



THE ARTS. 



FEBRUARY, 1805. 



ARTICLE I. 



Experiments and Remarks on the Augmentation of Sounds. In a 

 Letter from Mr. John Gough. 



To Mr. NICHOLSON. 

 SIR, 



l\ FACT is mentioned in a former communication of mine Sounds heard 

 to your Journal (oclavo, vol. III. p. 41) which prpves, that f "ten^cd^fur- " 

 a ftroke given to an extenfive vibrating furface by a ilender face. 

 rod, produces a found pofleffing a high degree of force: from 

 tins it follows, that the range of a found may be extended by- 

 enlarging the vibrating furface, while the magnitude of the 

 impulfe remains-the fame. The preceding maxim is of great 

 ufe in acouftics; but as the truth of this propofition refls at 

 prefent on the authority of a local obfervation, it may not 

 appear fuperfluous to give a few eafy experiments in confir- 

 mation of the fact 



Experiment J. — My firft attempt endeavoured to prove, that Exp. i. The 

 when a found ceafes to be audible from remotenefs, the en- beaCl "§ of " a 



watch audible at 



Jafgement of the vibrating furface will again render it diftinct a greater diftance 

 at the fame diftance. For this purpofe, a watch was f u f. when in coaudt 

 ,. iiriiir i t Wltn a metallic 



pended, on a calm day, irom the branch or a tree, about 5^ plate. 



feet from the ground. The clicking of it barely reached my 

 Vol. X. — February, 1805. F ear. 



