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Tone in an Interior Sound. but cnthe other fide, in an Exterior Sound, there 
}rather than precifely diftinguifh them; though tomake fome adumbration 
| of (that we mean) the Interior, ‘is rather an Impulfion or Contufion of 
one towards the other, differeth ava Blow differech from aCut. 
Ps 
| moveth withinitfelf, or is blown by a Bellows, givetha murmur oF, Interior 
| Sound. 
! Ise is radi? and itis’ one’éf the ftrangeft fecrets in Sbuinds ; hid ie 
| ing a Note towards the Sound it felf, which is the Paflive ; and thar it 
‘}be not toonear, but at a diftance : For ina Recorder, the three upper- 
| moft holes yield one Tone; which isa Notelower thin the Tone of the 
-|firtthree. Andthe'like (no doubt) is required in the winding or ftopping 
} of putings, s na | 
tip,) whether it bd lenides or fofter, is an Interior Sound ; bur the Speak. 
Jing out, isan Exterior Sound: And therefore « you can never make a Tone, 
}nor fing in Whifpering; but in Speech you may. So Breathing, or Blow- 
Jing by the Mouth, Bellows, or Wind (though loud) is an Interior Sound, 
} but the blowing thorow 4 Pipe, or Concave (though foft) is an Exterior. 
{So likewife, the greateft Winds, if they have no coatétation, or blow not 
| hollow, give any Interior Sound; the whiftling or hollow Wind, yieldeth 
fa finging » ot Exterior Sound ; the former being pent by fome other | 
| Body; the latter being pent in by his own Denfity: And therefore we fee, 
an Exterior Sound, greater or leffer ; infomiich, as if tfic Percuffion be over- 
| it never giveth an Exterior Sound ; as if you. blow ftrongly witha ae 
ae in every fmall part of theAir, So thar all the curiows diverfity of Atriz 
Century TTY | 45 | 
unlikely , thar thofe that make Recorders, &c. Kiow. dito already Po for 
that they make them in Sets. And likewile Bell-Founders in -ftting the. 
} cune of their Bells: So that enquiry may fave tryal. Surely, it hath been 
| obferved by one of the Ancients, that anempty Batrel knocked pos wi h 
BB ihcfinger, giveth a Diapafon to the Sound of the like Barrel full: But how 
thar fhouldbe, | do not well underltand, fer that the knocking of a Barrel 
| fullor empty, doth fcarce giveany Tone. 
There is required tome fenfible difference in the Proportion of creat: 
Experiments 
in Confort, 
touching 
Exterior and 
Interior ° 
Sounds. 
Here is Hes difference of Souris which wewill cail Exterior and 
Interior. Ivis not Soft nor Loud ; noritisnot Bafe, rior Trebble ;_ nor 
itis not Aufical, nor Immufical, T Houweh it'be true, thar there can be no 
may be both Mufical and Immufical. We fhall therefore enumerate them, 
the Air, than an Eljfion or Section of thefame; foas the Percuffion of the 
1 
fi Speech of Man, the Whilpeting, ‘(which they call Sufrras i in wits 
That when the Wind bloweth hollow, itis‘a fignof Rain; the flame,’as it 
There is no hard Body, but ftruck againtt another hard Body, will yield | 
| fof, irmay induce a nullity of found, but never an Interiot Sound; aS when 
pore treaderhfo foftly, that heis not heard. 2 
* Where the Airis the Percutient, pent ornot pent, againfta hard Body; 
againtt a Wail. 
“Sounds (both Exterior and Hater may be made a8 Well by sions! as 
b Sihiffion of the on _as in NA a sae . 
2 BAS 10D 192. 
Experiments 
in Confort, | 
touching . | 
Articulations! 
of Sounds. 
‘whole Sound is not inthe’ whole Air onely , but the whole Sound ‘is 
culate 
