5 * 
Experiments 
in Conform 
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the mare 8 «f« 
Twes, or Mufi- 
call$o*»ite. 
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I T is eliidcnt, that the Fercajfuw ofthc Gmter quant; typfAire ^ cauleth 
the Safer Sound • And the lefle Quantity* the more Treble The 
Percujjion of the Greater Quantity of Aire* is produced by the Greatneffe #/ 
the Body Percujftng j By thcZ-tf/Wtfof the Concaue* by which the 
paCethiand by the Longitude of the fame Concaue. Therefore we lee that a 
Safe firings is greater than a Treble > A Safe Pipe hath a greater Bore than 
zTreble^ And in Pipes i and the like,the lower theNotc Holes be,and the 
further off from the Mouth of the Pipe, the more Bafe Sound they yeeld • 
And the neerer the Mouth, the more Treble. Nay more, ifyouftrike an 
Entire Body, as an Andiron of Brajfe* at the Top, it rnaktth a more Treble 
Sound • And at the Bottomc %Bafer. 
It is alfoeuidcnt, that the Sharper or Quicker Fercufiiou of cauleth 
the more Treble Sound •* And the Slower or Heauisr* the more Bafe Sound. 
So we fee in Strings ^the more they are wound vp,and (trained;(And ther- 
by giue a more quicke ftart backej )the more Treble is the Sound-, And the 
flacker they arc,or lefle wound vp, the Safer is the Sound. And therefore a 
Bigger String more It rained, and a lefler String, lefle {trained, may fall in¬ 
to the fame Tone. 
Children* Women* Eunuchs haue more fmall and fhrill Voices than Men, 
The Realbnis, not for that Men haue greater Hear, which may make 
the Voice ftronger, (for the ftrength ofa Voice or Sounds doth make a diffe¬ 
rence inthe Loudnejfe or Softnefje, but not in the Tone ; ) But fromthe 
Dilatation of the Organ; which (it is true) is likewife cauled by Heat. 
But the Caufe of Changing the Voice* attheyeares of Puberty, is more 
obfeure. It leemeth to be, for that when much of the Moifture of the Body 
which did before irrigate the Parts, isdrawnedowne tothe Spcrmaticail 
veflels * it leaueth the Body more hot than it was ; whence commcth the 
Dilatation of the Pipes: For we fee plainly, ail Effe&s of Heat, doc then 
come on 5 AsPilolity, niorcRoughnelfeof the Skin, Hardnefleof the 
Flefli, &c. 
The Induftry of the Mnfitian* hath produced two other Meanes of 
Straining* or Menfiou of Strings* befides their Winding vp. The one is the 
Stopping of the String with the Finger • Asia the Neckes of Lutcs,Vio!s, 
&c. The other is the ShortueJJe of the String ; As in Harps, Virginalls, 
Sec. Both thefc haue one, and the fame reafon; for they caufe the String 
to giue a quicker flart. 
In the (Iraining of a String* the further it is ftrained, the lefle Superjtrai- 
ning goeth to zWote , For it requireth good Winding of a S cring, before 
it will make any Note at all : And in the Stops of Lutes, &c. the higher 
they goc, the lefle Diftance is betwcenc the Frets. 
If you fill a Drinking Glajfe with water % (efpeciallv one (harpe below, 
and Wide aboue,) and fillip vponthe Brim,or Out-fide ; And after emp¬ 
ty Part of the water* and lb more and more, and ftill try the Tone by Fil- 
lrjpping ; you (hall find the Tone fall, and bee more Bafe* as the Glajfe is 
more Empty* 
- The, 
