A ERIS IN TVBIS. 3S9 



Coroll. 2. 



113. Simili moJo pro ca(u quo tubus in B Tab. VIII 

 e([ claulub coiitinuationis Icaiiie dcnfitaium c M area *'S- 98- 

 hac rjtionc dcfmitur 



B cT y\ = l B {i m - T M) - B c t m 



cx quo fufficit eius applicatas TM alViiinauifle. 



Coroll. 5.- 



VI 4. Si diftantia IB— ^ prae intcruallis BT 

 r= B / — .V fucrit yalde magna , vt fit e ^z: i ; vel 

 fi fradtio ^ vt conftans fpecflari polTit , crit 2 e *> 



f e~~^ i/y — 1 y ; ex quo pro vtroquc cafu fit z—f^ 

 hincquc continuatio pcrinde fe habcbit , ac fi tubus 

 eflet cylindricus. 



Problema Sgi. 



115. Si tubus hyperbolicus in termino A fuc- Tal^- VIII 

 rit apertus , et aer in eo contcntus pcr (p;itium mi- '^' ^^' 

 nimum G H de acquihbrio vtcunquc turbctur , hu- 

 ius pulfus prop-iijationcm dcterminarc. 



S o 1 u t i o. 



Super intern.illo G H dclcrlbatur vtraquc fcala' 

 denfitatum G M H ct cclcritatum GNH, ita vt fi 

 in T pofita diftantia ITzzS, initio fiierit denfitas 

 — Q et celeritas in pllgam A H ~ T fint' applica- 

 tac T M ^ —/} ct T N zi: ^^^. His fcaUs crtnflii 

 Ccc 3. tutis 



