Mifcellanea Curiofa. 129 



even Surface, according to the degrees of its in- 

 equality, and fbmewhar alfb, when it paffes over 

 the plain Superficies of a Body that is hard and 

 refilling. 



Wherefore the (booth Top of the Water (by 

 reafon of its yielding to the Arch'd Air, and 

 gently arifing again with a kind of Refurge, like 

 to Elafticity, tho' it be not fo, by which Re- 

 furge it quickens and haftens the motion of the 

 Air rowling over it, and by its yielding pre- 

 ferves it in its Arch'd Cycloidical or Elliptical Fi- 

 gure) the fraooth Top of the Water, I, fay, for 

 thefe Reafbns, and by thefe Means, conveys a 

 Sound more entire, and to a greater diftance 

 than the plain Surface of a piece of Ground, a 

 Wall, or any other Solid Body whatever, can 

 do. 



As for the Speaking Trumpet, by which a Voice 

 may be convey'd to a confiderable diftance, I re- 

 fer its confHeration to that of f{efraHed Sounds, or 

 J{ef ratted Audition. 



Thus much of the Improvements of Hearing, 

 that refpecl: its Objeft, which is Sound. 



2. The Organ and Medium are to be canfider'd. 

 And, 1 . The Organ, which is the Ear, is helpt 

 much by placing it near a Wall (efpecially at one 

 end of an Arch, the Sound being begotten at the 

 other) or near the Surface of Water, or of the 

 Earth, along which the Sounds are moft eafiiy 

 and naturally convey'd, as was before declara, 

 And 'tis incredible how far a Sound made upon 

 the Earth (by the trampling of a Troop of 

 of Horfes, for Example) may be heard in a ftill 

 Night, if a Man Wys his Ear dole to the Ground 

 in a large Plain. 



K 



OtdCQH* 



