Mifcellanea Curiofa. 139 



their Thoughts towards the making of Experi- 

 ments for the compleating this (yet very imper- 

 fect, tho' noble) Science ; a Specimen whereof I 

 will give you in three Problems, and then pre- 

 fent you with the Semiplane of an Acouftk]^ or 

 Phonical Sphere, as an Attempt to explicate the 

 great Principle in this Science, which is The Pro- 

 grejfton of Sounds. 



The Problems are thefe : 



it Sonum intendere quoufque velis ; or, Datum 

 fonum ad datum gradum intendere. 



X. Sonum extender e quoufque velis ; or, Datum 

 fonum ad datum diflantiam extendere feu propa- 

 gare, 



3. Sonum tranfire ab extremo ad extremum 

 non per Medium* 



ll The fir ft is, To make the leaft Sound (by the 

 help of Inftruments) as loud as the great eft \ 

 a whilper to become as loud as the (hot of a 

 Cannon. 



By the help of this Problem, the moft minute 

 Sounds in Nature may be clearly and diftin&Iy 

 heard. 



x. Thefecond is, To propagate any (the leaft) 

 Sound to thegreateft diftance. 



By the help hereof any Sound may be con- 

 vey a to any, and therefore heard at any diftaiice, 

 (I muft add, within a certain, tho' very large 

 Sphere.) 



Moreover , by this means, a Weather-cock 

 may be fo contriv'd, as that wiih an ordinary 

 blaft of Wind it {hall cry (or whiftle) loud e- 

 nough to be heard many Leagues : Which hap- 

 pily may be found of feme u&, not only for P/- 



lots 



