1. Near a _Smooth Wall_, either Plain or Arch'd (Cycloidically or Elliptically, rather than otherwise, tho' a Circular or any Arch will do, but not so well.) Hence in a Church, the nearer the Preacher stands to the Wall (and certainly 'tis much the best way to place Pulpits near the Wall) the better is he heard, especially by those who stand near the Wall also, though at a greater distance from the Pulpit; those at the remotest end of the Church, by laying their Ears somewhat close to the Wall, may hear him easier than those in the middle. Hence also do arise _Whispering Places_. For the Voice being apply'd to one end of an Arch, easily rowls to the other. And indeed were the _Motion_ and _Propagation_ of Sounds but rightly understood, 'twould be no hard matter to contrive _Whispering Places_ of infinite variety and use. And perhaps there could be no better or more pleasant hearing a _Consort of Musick_ than at such a place as this, where the Sounds rowling along together, before they come to the Ear, must needs consolidate and imbody into one; which becomes a true composition of Sounds, and is the very Life and Soul of Consort. 2. If the Sonorous Body be plac'd near _Water_, the Sound will easily be convey'd, yet mollified; as Experience teacheth us from a Ring of _Bells_ near a River, and a great _Gun_ shot off at Sea, which yet differ much in the strength, and softness and continuance, or propagation of their Sounds, from the same at Land, where the Sound is more harsh and more perishing, or much sooner decays. 3. In a _Plain_ a Voice may be heard at a far greater distance than in uneven Ground. The _Reason_ of all which last nam'd _Phænomena_ is the same; because the Sonorous Air meeting with little or no resistance upon a _Plane_ (much less upon an Arch'd) smooth Superficies, easily rowls along it, without being let or hinder'd in its Motion, and consequently without having its parts disfigured, and put into another kind of Revolution, than what they had at the first begetting of the Sound. Which is the true cause of its _Preservation_ or _Progression_, and fails much when the Air passes over an uneven Surface, according to the degrees of its inequality, and somewhat also, when it passes over the plain Superficies of a Body that is hard and resisting. Wherefore the smooth Top of the Water (by reason of its yielding to the Arch'd Air, and gently arising again with a kind of Resurge, like to _Elasticity_, tho' it be not so, by which Resurge it quickens and hastens the motion of the Air rowling over it, and by its yielding preserves it in its Arch'd Cycloidical or Elliptical Figure) the smooth Top of the Water, I say, for these Reasons, and by these Means, conveys a Sound more entire, and to a greater distance than the plain Surface of a piece of Ground, a Wall, or any other Solid Body whatever, can do.