- The first is, To make the least Sound (by the help of Instruments) as loud as the greatest; a whisper to become as loud as the shot of a Cannon.
By the help of this Problem, the most minute Sounds in Nature may be clearly and distinctly heard.
- The second is, To propagate any (the least) Sound to the greatest distance.
By the help hereof any Sound may be convey'd to any, and therefore heard at any distance, (I must add, within a certain, tho' very large Sphere.)
Moreover, by this means, a Weather-cock may be so contriv'd, as that with an ordinary blast of Wind it shall cry (or whistle) loud enough to be heard many Leagues: Which happily may be found of some use, not only for Pilots in mighty tempestuous Weather, when light Houses are render'd almost useless, but also for the measuring the strength of Winds, if allowance be made for their different moisture. For I conceive, that the more dry any Wind