1
ſe parat particulas aliquas aeris ibidem relictas, ita
que intercapedines, quæ ſeparant aeris particulas,
partim occupantur ab igne, partim ab inani ſpatio,
dum igneæ particulæ motu velociſſimo conuertun
tur, & vertigines complent, intercipiendo grandia
ſpatia inania; vndè malè hinc infertur raritas maxima
ad quam aer ampliari poteſt.
ſe parat particulas aliquas aeris ibidem relictas, ita
que intercapedines, quæ ſeparant aeris particulas,
partim occupantur ab igne, partim ab inani ſpatio,
dum igneæ particulæ motu velociſſimo conuertun
tur, & vertigines complent, intercipiendo grandia
ſpatia inania; vndè malè hinc infertur raritas maxima
ad quam aer ampliari poteſt.
Cap.
5. de ae
ris grauitate
æquilibrio,
ſtructura, &
vi elaterią
eius.
ris grauitate
æquilibrio,
ſtructura, &
vi elaterią
eius.
PROP. CXVII.
Secunda Merſenni experientia in ſclopeto pneumatico
fact a dubia quoque eſt.
fact a dubia quoque eſt.
MElior eſt ſecunda Merſenni experientia dùm̨
in bombarda, ſeu ſclopeto pneumatico ma
gno conatu immiſit vaſtam aeris molem, quæ in exi
guo ſpatio condenſata fuit, aitque pondus ſexagin
ta granorum aeris incluſiſſe in cauitate catapultæ, quæ
ab 8. vncijs aquæ impleri poterat, hinc deducit ae
rem in ſclopeto immiſſum adeò condenſari vt quin
decies ſpatium internum catapultæ expleat; proin
de que tres digitos cubicos aeris ferè ponderare gra
num vnum. Sed ex tanto apparatu tandem Merſen
nus nil certi colligit, cùm afferat innumeras difficul
tates, & ingenuè fateatur, ſemper dubitari poſſe an
intra catapultæ cauitatem vnà cum aere inſuffletur
particula aliqua oleaginoſa, vel aquea, quandoqui
dem epiſtomium emboli humectari debetin eius ſu
perficie coriacea, vt omninò rimæ claudantur, vt re
greſſus aeris prohibeatur.
in bombarda, ſeu ſclopeto pneumatico ma
gno conatu immiſit vaſtam aeris molem, quæ in exi
guo ſpatio condenſata fuit, aitque pondus ſexagin
ta granorum aeris incluſiſſe in cauitate catapultæ, quæ
ab 8. vncijs aquæ impleri poterat, hinc deducit ae
rem in ſclopeto immiſſum adeò condenſari vt quin
decies ſpatium internum catapultæ expleat; proin
de que tres digitos cubicos aeris ferè ponderare gra
num vnum. Sed ex tanto apparatu tandem Merſen
nus nil certi colligit, cùm afferat innumeras difficul
tates, & ingenuè fateatur, ſemper dubitari poſſe an
intra catapultæ cauitatem vnà cum aere inſuffletur
particula aliqua oleaginoſa, vel aquea, quandoqui
dem epiſtomium emboli humectari debetin eius ſu
perficie coriacea, vt omninò rimæ claudantur, vt re
greſſus aeris prohibeatur.
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