278 



DE PRINCIPIIS 



Cum nunc pro pundo 2 fint celcritates fecundum 

 diredliones ternis axilus paralleks «, t, iv, fundtio- 

 nes quatuor variabilium .v, y^ z et t hinc pro fin- 

 gulis angulis hae celeritates ita fe habebunt 



celeritas celeritas celeritas 



Pro 2 fecundwm OAzz z/, fec. OBni^, fec. OC:=:w 

 Pro Lfec OAzzu-hdx{^^J,(ec.OBz:iv-{-dx{^^) 



ftc.OCztw-\-dx(^^ ) 

 Pro Mfec. OA-«4-^j/(f-i), fec. OBrrT-l-^jCr! ) 



ay' 



ay 

 d 10 



{ccOCzzw-^dj^lf) 

 Pro Nfec. 0Air«4-^5;(^), fec. 0B=:^'4-^s(^) 



fec.OCz=^4-^<^^. 



His ergo celeritatibus tempurculo dt haec q^uatuor 

 punda 2, L, M, N transfcrentur in z^ /, w, « quac 

 fequentibus ternis coordinatis determinabuntur : 



Oxzzx^udi xyzzj^vdt 



yzzzz-^-wdt 



Orz=.x-\-dx~\-udt-\-dtdx {^£j , rpz:zy-\- n:dt-^ dt dx ( f^ ) 



plz^z^wdt-^-dtdx^l^l) 



Oszzx-\-udt-^dtdy{l^^) , 



Oiznx-i-udt-i-dtdzC^-^), 



sq—y-^-dy+i^dtidtdy. ~ ) 

 q?n-z^ivdt-\-atdj{'^^) 



tozzy-\-vdt-\^dtdz{'^ ) 



d z 

 d IV 



■onzz.z+dz-iivdt-YdtdzC^^" ) 



d z 



Fluidi 



