3* 



3\(aturall Hijlory- 



132 



I with the Motion,caufed by Noife upon the water. But thete Effects are from 

 : the Locall Motion of the Air, which is a Concomitant of the Sound, (as 

 hath been faid-,) and not from the Sound. 



It hath been anciently reported, and is ftill received, that Extreme ap- 

 plauj es,md pouting of people affembled in great Multitudes, have fo ratified, 

 and broken the Air, that Birds flying over, have fallen down, the Air be- 

 ing not able to fupport them. And it is beleeved by fome, that great Ring- 

 ing of Bells in populous Cities, hath chafed away Thunder : and alfo diffipa- 

 ted Peftilent Air .• All which may be alfo from the Concuffion of the Air, 

 and not from the Sound. 



A very great Sound,neav hand, hath ftrucken many Deaf; And at the 

 Inftant they have found, as it were, the breaking of a Skin or Parchment in 

 their Ear : And my felf ftanding near one that Lured loud, and (brill, had 

 fuddenly an Offence, as if fomewhat had broken, or been dillocated in my 

 Ear And immediatly after a loud Ringing •, (Not an ordinary Sing- 

 ing, or Hilling, but farre louder, and differing :)!o as I reared fome Deaf 

 nejs. But after fome half Quarrer or an Hour it van ihed. This Effed 

 may be truly referred unto the Sound ■ rbifas is commonly received\in over- 

 potent object doth deftroy the &enfe ■ And fpiritmll Species, (both Vifble 

 and Audible^) will work upon the Senfories, though they move not any other 

 Body. 



In Delation of Sounds, the Enclofure of them preferveth them, and caufeth 

 them to be heard further. And we find in rovvles of Parchment,or Truncks, 

 the Mouth being laid to the one end of the rowl of Parchment, or Trunck, 

 and the Ear to the other, the Sound is heard much further, then in the Of en 

 Air. The Cauje is, for that the Sound fpendeth,and is diffipated in the open 

 Air but in fuch Concaves it is conferved, and conm&ed. So alfo in a 

 Peece of Ordnance, if you fpcak in the Touch-hole, and another lay his Ear 

 to the Mouth of the Peece, the Sound pafleth, and is fane better heard,than 

 in the open Air. 



It is further to be confidered, how it proveth and worketh,when the Sound 

 is not enclofed all the L ength of his way, but pafleth partly through open 

 Air 5 as where you fpcak lome diftarice from a T runck «, or where the Ear 

 is fome diftance from the T runck, at the other End h or where both Mcu'.h 

 and Ear are diibnt from the Trunck. And it is tiyed, that in a long T runck, 

 of fome eight or ten foot, the Sound is holpen, though both the Mouth, and 

 theEarhe ahandfull, or more, from the Ends of the Trunck And fome, 

 what more holpen, when the Ear of the Hearer is near, than when the Mouth 

 of the Speaker. And it is certain, that the Voice is be tter heard in a Cham* 

 her from Abroad, than Abroad from within the Chamber. 



As the Enclofurejhat is Round about and Entire ,prefei veth the Sound ■ fo 

 doth a Semi-concave, though in a lefs degree. And therefore, if you divide 

 uTrunck, or a Cane into two, and one fpeakatthe one end, and you lay 

 your Ear at the other, it will carry the Voice further, than in the Air at 

 large. Nay further, if it be not a full Se mi-c oncave •, but if you do the like 

 upon the Majloi a Ship, or a long Pole, or a Peece of Ordnance (though 

 one fpeak upon the Surface of the Ordnance, and nor at any of theBores^) 

 the Voice will be heard further ,then in the Air at large. 



It would be tryed, how, and with what proportion of difadvantage 

 the Voice will be carried in an Born, which is a line Arched ^ Or in ; 

 Trumpet, which is a line Retorted 5 Or in fome Pipe that were Si- 

 nuous. 



