a io DE PHAEN. MOTVS TERRAE DIVRNI 



X. Nunc cum refpedu ternorum axium prin- 

 cipalium A, B, C momenta inertiae terrae fint 

 Maa, MW, Mcc quafrantur primo tres quantita- 

 tes x, j, z ex his aequationibus : 



dx-\-- c ~ a dt{yz— 3 Vcof.-vicof.O) — o 



^+i^ c <//(**- 3 Vcof.<cof.0)_o 



dz -+- h -^TT^ dt ( x y — 3 V cof. ^ cof >)) — o 



tum vero rcl qua elementa fitum terrae determinan^ 

 tia ex his aequationibus colligi oportet : 



dl — -dt{y{\n.§-\-zztf (p) 

 d(p —xdt— jj^i 



, d t (y co r . < $ — zjm. $ ) 



d^\> — j~~l 



qnarum aequationum ratio ex iis , quae de motu 

 corporum gyratorio circa axem mobiiem alibi tra- 

 didi , haud dimculter deducitur. 



XI. Quoniam vero momcnta inertiae pro axi- 

 bus B et C aequalia ftatuimus vt fit cc—bb, pri- 

 mo quidem ob dxzzzo habebimus xzzzf quant tatl 

 ncmpe conftanti $ tum Tero ponendo breuitatis gra- 



tia a ^riT — a reu H — x -^ a » quinque fequentes 

 aequationrs refolui oportet : 



^ + ct^(/a-3Vcof.<coC0) — o 



^2-a<//(/y-3Vcof.<cof ti)_o 



dlzzz-dt (j^fin. $ -f- z cof. (p) 



