ISS D E M T V 



Cn.(w/ + jj.)— cof.w^ et fin.(«;4-y)=:cor.«/ 

 tum vcro 

 cor»u + |j.)=r— fin.»// "et cof.Oit-]- v) — -Cm nt. 



Pro motu penduli fcquentes formulas penitus deter- 

 minatas habebimus 



1*. S-=30,97i72acor,«?-f OjOsSapacofw/ 



IP. 0—i,o7<?25acor.?///— 0,07551 acof.w? 



IIP. ii— - 8,4.75 39 «fi'^-'«^ -0,92533 afin.wf 



IV°. ^ =-9,39031 arin.w// + 2,5C572afin nt 



vbi vti inuenimus eft w:z: 8,72200 et « — 32,70717. 



§. 30. F.x his ergo formulis ad datum tcmpus 

 <]U0t3cunquc t in minutis fccundis exprcffum , non 

 fohim pofitio fili A B et corporis anncxi B M N 

 fed etiam vtriusque niotus tingulis defimri potcrif. 

 Statim autem maniftftiim efi ob tcrminos poficrio- 

 res angulum Ji t inuoluentes motum ofcillatorium 

 aliquantisper perturbari deberc ; intcrim tamen quia 

 hacc mcmbra prioribus iriulto funt minora , haec 

 perturbatio fatis crit cxigua ; quantopcre autem ob 

 hanc caufim in dinumcrandis olcillationibus aberrari 

 pofiit , aliquanto accuratius inuefligcmus , fi quidem 

 iam fupra obfcruauimus ofcillationes huius penduli 

 flexilis tam parum ab ofcilJationibus eiusdem pen- 

 dnli , fi efict rigidum, difcrepare, et tcmpore 1028 

 ofciilationum vnica tantum olcillatione errari. 



§. 31. 



