J\(aturall Hiftory : 



Difcordintwo Parts 5 which Sounds we call Tones*, And like- 

 wife of Immuficall Sounds , And have given the Caufe, that the 

 Tawproceedethof Equality, and the other of Inequality, And 

 wc have alfo expreffed there, what ate the Equal! Bodies that 

 give Tones, and whaa are the Unequal! that give none. But now 

 we (hall fpeak of fuch Inequality of Sounds, as proceedeth, not 

 from the Nature of the Bodies themfelvcs, but is Accidental^ 

 Either from the Rougbnefi, or Obliquity of the Pajjage 5 or from 

 the Doubling of the Percutient< Or trcm the Trepidation of the 

 Motion. 



A Bell, if it have a Rift in it, whereby the Sohnd hath not a clear Paflage, 

 ! giveth a Hoarje and jarring Sound So the Voice of Man, when by Cold 

 I taken the Wefill groweth rugged, and (as we call it) furred, becometh 

 hoarfe. Andinthefe two Inflances the Sounds are Ingrate-, becaufe they 

 are meerly Unequal! •• But, if they be Unequall in Fqu.iliiy, then the Sound is, 

 Gratefull,but Purling. 



All Inflruments, that have either Returned as Trumpets h Or Flexions^ 

 Cornets Or are Drawn up,m<i put from As SockbutS: ; have a Burling Sound 

 But the Recorder, or Flute, that have none of thefe Inequalities, give a clear 

 Sound. Neverthelefs, the Recorder it felt, or Pipe moiftened a little in the 

 In(ide,foundeth more folemnly, and with a little Purling, or Hiding. A- 

 gain,a Wreathed String, fuch as are in the Bale Strings or Bandoraes i giveth 

 al fo a Purling S ound, " 



But a Lute- firing, if it be meerly Unequall in his Parts, giveth a Harfti 

 and Untuneable Sound, which Strings we call Falfe, being bigger in one 

 Place then in another And therefore Wire- firings are never Falfe. We fee 

 alfo, that when we try a Falfe Lute- firing, wc uie to extend it hard between 

 the Finger s,and to fillip it h A nd if it giveth a double Species, it is True ; But 

 if it giveth a trebble,or more,it is Falfe. 



Waters, in the Noije they make as they runne,reprefent to the Ear a Trem- 

 bling Noife And in Regals (where they have a Pipe, they call the Nightin- 

 gale-Pipe, which containeth Water) the S ound hath a ccntinuali Trembling; : 

 And Children have alfo little Things they call Cocks ,which have Water in 

 them-, And when they blow, or whittle in them, they yedd a Trembling 

 Noife h Which Trembling of Water, hath an ajflnity with the Letter L. 

 All which Inequalities of T repidation^ are rather plea lan t,than other wife. 

 | All Bafe Notes, or vetyTrebble Notes, give an Afper Sound h For that the 

 | Bafe ftriketh more Air, than it can well ftrike equally : And the Trcbble cut- ' 

 | teth the Air fo fhafp, as it returneth too fwift,to make the SoundEqmlh And 

 ! therefore &Mean,ox Tenor, is the fweeteft Part. 1 

 | We know Nothing, that can at pleafure make a Muficall, or Immuficall 

 Sound, by voluntary Motion,but the Voice of Man, and Birds. The Caufe is, 

 (no doubt) in the Weafill or Wind-Pipe, (which we call Afper 'a Art en a,) 

 which being well extended, gathered Equality • As a Bladder that is 

 wrinckled, if it be extended, becometh fmooth. The Extenlion is al- 

 I waves more in T ones, than in Speech : Therefore the Inward Vox* brWhifper 

 : can never give a Tone: And in Ringing,, there is (manifeitlyj a greater 

 | Working and Labour of the Throat, than in Speaking h as appeareth 

 l|QK>3hCr g a in 



