Mifcellanea Curiofa. 137 



into Motion ? Yet in complicated or Compound 

 Ecchoes, where many receive from one another, 

 I know not whether fomething that way may not 

 be done. 



From the determinate Concavity or Arched- 

 nefs of thefe reflecting Bodies, it comes to pals, 

 that fome of them, from a certain diftance orpoli- 

 ture, willeccho back but one determinate Note, 

 and from no other place will they reverberate a- 

 ny ; becaule of the undue Pofition of the (bund- 

 ing Body. Such an one (as I remember) is the 

 Vault in Merton College in Oxford, 



4. As a Speculum takes in and reflects more 

 of its Object, when plac'd at a great diftance 

 from it, than when nearer ; becaufe it reflects 

 according to the apparent Magnitude of the 

 Body at fuch a diftance, which is lefs : So alfo 

 the Ecchoing Body, being remov'd farther off, re- 

 flects more of the Sound, than when nearer. And 

 this is the reaton, why lome Ecchoes repeat but 

 one Syllable, fome one Word, and fome many. 



As Specula s may be fb plac'd, that reflect- 

 ing one upon or into the other, either directly or 

 obliquely, one Object fhall appear many ; as in 

 Sir Samuel Moreland\ Glafs-room : After the fame 

 manner Ecchoing Bodies may be (b contriv'd and 

 plac'd, as that reflecting the Sound from one to 

 the other, either directly and mutually, or ob- 

 liquely and by Succeflion , out of one Sound Ihall 

 many Ecchoes be begotten ; which in the firft 

 cafe will be all together, and fbmewhat ia- 

 volv'd or fwallow'd up of each other, and 

 thereby confus'd (as a Face in Looking-glafles 

 obverted) in the other they will be diftinct, fepa- 

 rate, and fucceeding one another ' 7 as moft mul- 

 tipU Ecchoes do* 



Moreover 



