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Natural Eliftory ; 
127. 
128. 
129. 
130. 
131. 
132.6 
| che Motion, caufed by noife upon the Water. But thele effets arefrom 
_|.in the open Air; but in fuch Coneaves, it is conferved and contraéted. 
thelocal motionof the Air, which isa concomitant of the Sound (ashath ‘ 
been faid) and not from the Sound, lo) a 
Ithath been anciently reported, andisftill received, that extream ap-| — 
plaufes, and fhouting of people. aflembled ingreatmultitudes, have forari-| 
fied, and broken the Air, that Birds flying over, have faln down, the Airbe- 
ingnot ableto fupportthem. And it isbelievedby fome, thatereat Ring-| — 
ing of Bells in populous Cities, hath chafed away Thunder; and alfo dif-| _ 
fipated peftilent Air: All which may be alfo fromthe concuffion of the Air, | 
and notfrom the Sound. | ae 
A very great found near hand, hath ftrucken many deaf; and atthe | 
inftant they havefound, as it were, the breaking of aSkinof Parchmentin 
their Ear : And my felf, ftanding near one that lured loud and fhrill, had| — 
fuddenly an offence, asif fomewhat had broken, or beendiflocated inmy| — 
Ear, and immediately after a loud Ringing; (not an ordinary Singing, or 
Hiffing, but far louder, and differing ; fo as 1 feared fome Deafnefs. But | — 
after fome half quarter of an hour, it vanifhed. ‘Thiseffe& may be truly | — 
referred unto the Sound ; for (as is conmenly received) an overpotent| — 
Obje& doth deftroy the Senfe ; and Spiritual Species, (both Vifible and ¢ 
: 
: 
Audible,) will work upon the fenfories, though they move not any other | 
Body. f A ore 
A Delation of Sounds, the enclofure of them preferveth them, and | ; 
caufeth themtobe heard further. And we findein Rowlsof Parchment, or| 
Truncks, the Mouth being laid tothe one end of the Row! of Parchment, | 
or Trunck, andthe Ear tothe other, the Sound is heard much further then 
inthe openAir. Thecaufe is, for thatthe Sound {pendeth, andis protic ! 
So 
alfo in aPiece of Ordnance, if youfpeakinthe Touch-hole, and another 
lay his Ear to the Mouth of the Piece, the Sound pafleth, and is farbetter# 
heard than in the open Air. | eee : 
It is further to be confidered, how it proveth and worketh when the | — 
Sound isnot enclofed, all the length of his way, but paffeth partly through} — 
epen Air; as whese you fpeak fome diftance froma Trunck, or where the'} ; 
Ear is fome diftance from the Trunck, at the other end; or where both} 
Mouth and Ear are diftant fromthe Trunck. Andit is tryed, thatinalon 
Trunck of fome Eight or ten foot, the found is holpen, though boththe | — 
Mouth, and the Ear be a handful ormore, from the ends of the Trunck; and | © 
fomewhat more holpen, when the Ear of the Hearerisnear, thanwhen the 
Mouth of the Speaker. And itiscertain, that the Voice is better heard in a| 
Chamber from abroad, thanabroadfrom withintheChamber. || 
As the Enclofure, that is round about and entire,preferveth the Sound ; fo | _ 
doth a Semi-concaye, though inalefsdegree. Andtherefore, if youdivide| | 
a'Trunck, ora Cane intotwo, andone fpeak at the one end, and you lay | | 
your Ear at the other, it will carry the Voice further,than inthe Ait at large. | || 
Nay further, if it be nota full Semi-concave; butif youdo the likeupon the | 7 
Maftof aShip, or along Pole, or a Piece of Ordnance (though onefpeak | ~ 
upon Surface of the Ordnance, and not at any of the Bores) the Voice will |) 
be heard further then in the Air at large. 4. a 
It would be tryed, how, and with what proportion of difadvantage,| 7) 
the Voice will be carried in an Horn, which isaLine Arched; or i 
Trumpet, which is a Line Retorted ; or in fome Pipe that were 
nuous. ; 
