CENTURY II. 97 



little wet. on the inside, it will make a differing sound 

 from the same pipe dry. 



168. That sound made within water doth com 

 municate better with a hard body through water, 

 than made in air it doth with air, &quot; vide experi 

 ment um 134.&quot; 



Experiments in contort touching equality and inequality 



of sounds. 



We have spoken before, in the inquisition touch 

 ing music, of musical sounds, whereunto there may 

 be a concord or discord in two parts ; which sounds 

 we call tones ; and likewise of immusical sounds ; 

 and have given the cause, that the tone proceedeth 

 of equality, and the other of inequality. And we 

 have also expressed there, what are the equal bodies 

 that give tones, and what are the unequal that give 

 none. But now we shall speak of such inequality of 

 sounds, as proceedeth not from the nature of the 

 bodies themselves, but as accidental ; either from the 

 roughness or obliquity of the passage, or from the 

 doubling of the percutient, or from the trepidation 

 of the motion. 



169. A bell, if it have a rift in it, whereby the 

 sound hath not a clear passage, giveth a hoarse and 

 jarring sound : so the voice of man, when by cold 

 taken the weasond groweth rugged, and, as we call 

 it, furred, becometh hoarse. And in these two 

 instances the sounds are ingrate, because they are 

 merely unequal : but if they be unequal in equality, 

 then the sound is grateful but purling. 



VOL. IV. H 



