io The Zh(jtural Hi/lory 



above the objeft, the Echo is beft heard in the valley f, & vice 

 verfa. All which, may be well enough made out by throwing a 

 ballagainft a wall, to which, if it be thrown in an oblique line, 

 it returns not to the thrower but to another place ; and though 

 the projicient do fo throw it, that it ftrikes at right angles with 

 the wall, yet (like as in the voice) if heftand too far off, it will 

 fall as much too iliort in the rebound, as it will exceed if he 

 (land too near. 



i 8. According to thefe grounds I carefully examined this 

 Echo, and found, upon motion backward, forward, and to each 

 hand, the true centrum phonicum, or place of the fpeaker, to be 

 upon the hill at Woodjiock. towns end, about thirty paces below 

 the corner of the wallaforefaid, direclly down toward the Kings 

 Majejiies Manor : from whence by meafure to the brow of the 

 hill, on which my Lord Rocheflers Lodge ftands, are 45^ Geo- 

 metrical paces, or 2280 feet ; which upon allowance of 24 Geo- 

 metrical paces, or 120 feet to each fyllable, to my great fatisfa- 

 ftion I found to be agreeable to the return of 1 9 fyllables, vi%, 

 one fewer than it returns in the night, and two more than in the 

 day. 



19. The meafure I muft eonfefs had been much more eafie 

 and natural, could I have began from the obje&, and fo removed 

 backward accordingly as the Echo gradually increafed in the repe- 

 tition of more fyllables ; for then I could have given the due 

 proportion to each, if I had found any inequality upon the in^- 

 creafe, which I guefs there may be, becaufc the allowance of an 

 equality feems to fet the objeft too far off by a fyllable or two. 

 But it not being feafible in this place, I was forced to take the for- 

 mer courfe ; for in the valley between the two hills, being the 

 whole medium through which the voice pafles, and the Echo re- 

 turns it, there is fcarce any fuch thing as an Echo to be found ; 

 nay, if youftandat the Manor itfelf, which is not far from the 

 true place of the fpeaker, and fituate almoftas high, and direct 

 your voice toward the place of the object, you (hall not have the 

 leaft return ; whence 'tis moft evkknt that I could not ufe that 

 procedure here, and therefore muft defire '%o he held excufec). 

 from giving the proportions of (pace, which I fuppofe, accord- 

 ing to Kircher 1 may decreafe , according as the number of fyl- 



Maya Fhonocampticai fretl. y. 



lables 



