Ai^BO- Caecer.um hanc ipfam experieneiam poftea faciKori ap~ 

 keCiu paratu infticui pofle animadverck Vir Acuciflimua JOH. AL- 

 PjHONSUS BORELLI, mediantealio ■ quodam inftrumcnto, 

 Vi %ll gt ^ujus ^brica hxc eft : * -AmfulU vMr$a AB> cujus dtameter 

 proxime quatuar digitos ad&qtfet > continuetur fr&ionga fiflula 

 $C, major duerum cubitorum > qu# inflexa Jit in ejus infimo lo- 

 co CEF, attfein Jufremo Coco ejus A, conttnueiur quo^ ftricla 

 aiia fifiula AD , cujus extremum Jupremum orificium apertum 

 X), claudi fofifit poH Mercurii infujionem fuitla vejica ) f>ftea> 

 terminus extremus alterius fiftuU FG uniatur cum aitero extre- 

 mo fiftula incurvata , affojitis colligatisque fortionibus inteftini % 

 &gnini % qu& ne rumfantur dijfringantur^ k nimio Mercurii pon- 

 dere panter operiantur fiftula vel digita<li coriaceo , at^ arffie 

 alligatis intefiinis , & corto utrisfy extremitatibtM fiftularum } fo- 

 terit facile fiftula FG 9 infteclifursum& deorsum fosi Mercurii 

 infuflionem , erigantur^ perfendiculariter ad Hori&ontem amb& i 

 fiftuU DBC, &GF. His fr&faratis per orificium D , infundatur \ 

 Hydrargyrum , cjuous^ du& fiftula BC, FG, & amfulia AB , re- 

 f leantur, relinquature^ fpatium fufremsfiftul^ ID aere plenum, 

 arcle poflea claudatur Jupremum orificium D, fuilla veftca$ tan-\ 

 dem fleclatur deorfum fijlula collateralis FG, ab ejus fupremo ore\ 

 G 9 profluens Mercurius excipiatur vafe MN, quous^ infimal 

 Mercurii libella (it LO, & fuprema fuperficies ejusdem Mercu- 

 rii (lagnantis Jit H> reliclo nempe ffatio vacuo D AB H ; qui% 

 verb Cylinflrus aereti* D I , dilatatur , expli^aturc^ pro ejm ge-\ 

 nio in (patio vacuo ibidem reliclo ,fit ut fojfit afiquando fost ejus { 

 dilatationem integr} &totaliter occupare jfatium D A BH, & 

 tunc cum non poffit amplius explicari Jua virtute etatere non im- 

 fe/tet deorsurn fuperficiem Hydrargyri H , & ideofumma altitu* 

 do Mercurii HO , erit inalterata , fcilicet cmnium maxima, ea- 

 mm , qu# fieri poffunt unius cubiti & o[uadrantis proxime , & 

 tunc exferiemia corpflat , aerem D I , maxime dilatatum intra 

 (patium D ABH, occupare locum centies ocluagies majorem^qudm 

 frius. Supfojita hfa cognitione , ?»b exferientia deducJa ,aenuo 

 operatio repetatur , & conflat , c[uod omnes moles aeris non ex- 

 sedentes Jpatium 1)1, non depriment mediocrem Mercurii eh* 



vattQ- 



f rid.T*. de Mptipn, l&£ural, a Gravit, f cndcot. piop i<?j, p,m.2ii. 



