V I B R A N T I B V S. 3pi 



ee (iif) = -Zl^S 



Kdx y ^,f {a-ct- xf 

 quibus f «rmulis aequiuioni 



Kdx )^'\l^) 



per^eae fatisfit; nequidem exclufo cafu a=:ct^x^ 

 \bi cnfpis occurr.t, ex quo fine dubio rcde conclu- 

 dere licet , fi cufpis adeo negotium non turbat , 

 multo minus angulo(as prominentias easque adco in- 

 fiuite paruas effe pertimefcendas. 



§. 12. His praenotatis integrale completum 

 noftrae aequationis ad iplum cafum propofnum chor- 

 dae vibrants adcommodemus, vbi duabus conditioni- 

 bus erit fatisficiendum. Primum lcilicet vt in A 

 "vbi xzzo, adplicata j» femper euanelcat pro omni 

 temfore /; deinde vt idem eueniat in altero termi- 

 no B, vbi x-z^a, Prima autem conditio pofito 

 X — o pnebet 



yzz(Pct-^y\,ct 



qui valor cum debeat effe — o, necefle eft , vt fit 



vp ct — -<^,ct 

 hoc eft , curua funclione v[/ repraefentanda ita efle 

 debet comparata , vt adplicata eidem abfciflae refpon- 

 dens negatiua fit illius , quae in curua (J) eidem' ab- 

 fciflae refpondet , vnde fequitur , fore generatim 



"^.{ct -x) — -(^. (f t-x)', 



vnde ifl;i conditio nobis fuppeditat hanc aequationem : 

 j' = Cj). (<r/ -^ X) -(^[ct-x-) 



fic 



