TAUTQCRRONIS IN VACUO. 65 



tcr abfcifnim, applicatum ct curiiam contcntiim. 

 Conftat lieindc ex curuae inuentione eam effe rcdi- 

 ficabilem. Qiiia s^gTj crit //^— ^' • vndc (Iz-— 



tUL. Kft vero dt^—'^/—tLl-^£lPl. Quarc dt 



1 6a 0+3-0 6 •^aa >- 



^:;=-^^V?^*-+-J4^*, ct hinc y(r//2^^s=)=z4|H- 



^/. Conlcquenter jV(^t'-^dz')zz.-^{t^. Qime 

 exprcftio dat vel arcum CN vcl CAiM vcl quoe^uc 

 corum ncgatiuos CL vel CLK. 



§. 28. Inuentis arca ct longitudine hiijus 

 curuiic-, rcfuluum cft id, quod maxinic ad ufum cjns 

 in horologiis pertinct , vt inucftigcmus radiuin 

 olculi, eoquc inucnto curuae hujus cuoUitam , quo 

 pendulum oCcilhuiones in hac curua abfoUiens con- 

 ftitui queat. Radius oscuU vcro erit , pofito «'s con- 



ftantc -^^^^j— -jcujusvalorcxfupcrioribusinucnietur 



Na m qu e eft (^/ = -^-dz - f- ^±±±liPl , a tquc dzzz-^-^^-K 



/ i 4-Va 



f, i Za 



hinc quia</2 ponitur conftins,erit d(lz—0—'-l^t±±ty 

 unde habetur ddp—-z:^, Denique quia dt—^i£ziPj2j 

 crit ddtzz2^£t:z^t^—'=zSil-z:Pit,. His valoribus 

 in formula ^1L:^4?!^* fubftitutis , orietur radius os- 



dzddt ' 



cuU nn-iy-fj!^ , fienum — indicat radium oscuU ct 

 diametrum mter fe diucrgerc. 



Tom. IV. I §.29 



