170 EXPERfM. DE COMrRESSIO\E JERIS 



ctiiuii ob niunim latciitiiim fiirum in a b c d paiiini cle- 

 viitiim. Ab viiii piutc obtuianicnti tumor circa apcrtu- 

 ram bomb-.ic oricbutur , ct portio obturamcnti tandcm in- 

 ft.u Imrci tibris mcuruatis cxtrudcb;uur. Portquam bom- 

 ba pcr intci^ram ncK^cm ct (c.jucntcm dicm ita toriufac 

 cxpoiita crat , t<jllcbatur tanucm ct obturaculo rcmoio 

 igni admoucbarur , vt glacics liindcrctur. Hoc tado ap- 

 paratus cxcmtus ct intcgcr oblcruatus cll : tin(ftura tubu- 

 lum \Hjuc ad infigncm aitituuincm macuLuiciat ita , vt 

 limites acris comprciri dilhn»flc oblcruari potucri.nt. Aifr 

 vero idcm quod antca volumcn ui tubulo cdc obtinc- 

 bat , nifi quod calore aer expanlus parum mcrciuii cx 

 valculo fcrrco eiccerit , quo tamen fpatium acris lcnfibi- 

 litcr augcri haud potuit. Hinc ncc hic prclliDnc .icris 

 particulis mcrcuriuD ct aqua pcruii cualcrc , quac tanta fu • 

 it , vt acjua intcr fibr.is obturamcnti cx ligno bctulac prcfla , 

 illas inflar fibrarum lini facfli mollcs clHccrct Spatio 

 aeris comprcffi vt antca cum fpatio acris antc comprcifio- 

 ncm comparato , aer in partcm voluminis minorcm c)uam 

 trcccntcfimam prioris voluminis rcdacflus fuiffc iuucnicba- 

 tur. Si aqua omnis obturamcnto illibato in bomba con- 

 tincri potuiffct vsque ad rupturam , probabilucr ni minus 

 adhuc fpatium acr in tubulo n d c coadus fuiflct. 



§- 12. Limitcs ergo dcnfitatis acris dctcdos cflTc non 

 dum liquct, Conftat fblum vi pracccdcntis cxjKrimcnti , 

 acrcm prcfiionc atmofphacrac condcnlatum , finc fcnfibili 

 elafiicitatis dccrcmcnto in trcccntcflmam vc^luminis partcm 

 redigi poffc. Si maiori prcfiionc in minus fpatium acr 

 coarc^^ari poffct , limitcs comprctfionis nondum clli;nt de- 



tcdi. 



