iV zz 

 tang 



zze^efCiTi,f-2Sg{i 4-=^)/; 

 ig.x-tang.f-^L et 



( a a coj. f 



VzzyUe — tLilsU!2j. ^ tiUlLLU. \ . 



^ a a a* / > 



at poft tcmpus / n: £.^±^zLlL^J.) , perciirfo fpatio 



y — aa re -H e / Tm. f) (p r j o -f - ?/ /) — t c' f fin. f) 



globi motus vniformitatem attinget, eritquc tum 



-, — / [f / — £ fljWMJ) . 

 ^ aa-t-// ' 



tang. j = -L^iLiL-':L^L er 



** £ (a " -+-J JJ «^aj.f 



y V(gf // — :i g aa//iri. f -f. t6 a*/;r..f»_». t e fa a -H/f)- «/. f-) 



o .1 -H y / • 



Scholion. 



§. 32. Cafus hic praccipue eft memorabilis, quo 

 g1obo eiusmodi motus imprimi putcft, vt primo rccedat, 

 mox autem iterum reuertatur, quod expcrimento oncndi 

 fulet, dum digito ad globuni circa D applicato et dcor- 

 fum preflo duplex motus globo imprimitur, alter pro- 

 grcfTuius in diredione DIH, altcr gyratorius in (cnfum 

 Z D T E. Scd vt phacnomenon iucccdat, ncceffe c[\ vt 

 celeritas angularis prae pn^grcHiua ccrtum quendam hmi« 

 tem cxccdat, qucm quo faciHus ngnoscamus, calculum ad 

 iftiim cafum accommodcmus quo motus gyratorius globo 

 circa axeai horizontalem ct ad dirccfrioncin motus pro- 

 grcfTiui normalcm imprimitur. Quod fi crg ) e dcnotet ce- 

 lcriratcm prcgrcriuiam fccundum dircdioncm DIE, ct £ 

 celcritatem angularcm retrog\r<intcm in fenfum ZDTE, 

 cxilknte / radio globi et Maa eius momcnto inertiac, 

 fri<flionequc zr^Mj primo globus in dirc<flione DIK pro- 

 ccdct , et el.ipfo tcmporc / cius celeritas fecundum can- 

 dcm diredioncm crit v — e ~ ^^ g t , confc(flo fpatio 



X — 



