Heron <Alexandrinus>
,
Heronis Alexandrini spiritalium liber
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SPIRITAL. LIBER.
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nem faciamus, prius diſrumpetur vas, quàm aliquid ſuſci-
<
lb
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piat cum plenum ſit: </
s
>
<
s
xml:id
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echoid-s164
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xml:space
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preserve
">neque enim aëris corpora in minorem
<
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magnitudinem contrahi poſſunt: </
s
>
<
s
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xml:space
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">quare neceſſe erit ut in ſe
<
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ipſis habeant quædam intervalla, in quæ compreſſa mino-
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/>
rem obtineant molem: </
s
>
<
s
xml:id
="
echoid-s166
"
xml:space
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">hoc autem veriſimile non eſt, nul-
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/>
lo penitus exiſtente vacuo, & </
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>
<
s
xml:id
="
echoid-s167
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xml:space
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">cum corpora ad ſeſe applicen-
<
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/>
tur ſecundum omnes ſuperficies, & </
s
>
<
s
xml:id
="
echoid-s168
"
xml:space
="
preserve
">ſimiliter ad vaſis ambi-
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/>
tum, non poſſunt expulſa locum alicubi facere, non exi-
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lb
/>
ſtente vacuo aliquo: </
s
>
<
s
xml:id
="
echoid-s169
"
xml:space
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">quamobrem nullo modo in ſphæra
<
lb
/>
immittc
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unsure
/>
tur aliquid eorum, quiſunt extra, niſi excedat ali-
<
lb
/>
qua pars aëris prius in ea contenti, ſiquidem totus locus
<
lb
/>
conſtipatus eſt, & </
s
>
<
s
xml:id
="
echoid-s170
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xml:space
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">continuatus ut arbitrantur: </
s
>
<
s
xml:id
="
echoid-s171
"
xml:space
="
preserve
">at ſi quis
<
lb
/>
ſiphonem ori admovens ſphæram inflare velit, multum
<
lb
/>
immittet ſpiritum, non excedente aëre qui in ea eſt: </
s
>
<
s
xml:id
="
echoid-s172
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xml:space
="
preserve
">quod
<
lb
/>
cum ita ſemper contingat, manifeſto oſtenditur contractio-
<
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/>
nem fieri corporum in ſphæra exiſtentium in vacua impli-
<
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/>
cata. </
s
>
<
s
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="
echoid-s173
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xml:space
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">Contractio autem præter naturam fit ob immiſſionis
<
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violentiam: </
s
>
<
s
xml:id
="
echoid-s174
"
xml:space
="
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">ſi igitur aliquis inflans, & </
s
>
<
s
xml:id
="
echoid-s175
"
xml:space
="
preserve
">ad ipſum os manum
<
lb
/>
apponens ſtatim digito ſiphonem obturet, manebit omni
<
lb
/>
tempore conſtipatus aër in ſphæra: </
s
>
<
s
xml:id
="
echoid-s176
"
xml:space
="
preserve
">quod ſi quis aperiat rur-
<
lb
/>
ſus extra erumpet cum magno ſtrepitu, & </
s
>
<
s
xml:id
="
echoid-s177
"
xml:space
="
preserve
">clamore immiſſus
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/>
aër; </
s
>
<
s
xml:id
="
echoid-s178
"
xml:space
="
preserve
">propterea quod, ut propoſuimus, expellitur à dilata-
<
lb
/>
tione præexiſtentis aëris impetu quodam facta: </
s
>
<
s
xml:id
="
echoid-s179
"
xml:space
="
preserve
">rurſus ſi
<
lb
/>
quis velit aërem, qui in ſphæra eſt ore per ſiphonem attra-
<
lb
/>
here magna copia conſequetur, nulla alia ſubſtantia in
<
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/>
ſphæram ſuccedente, quemadmodum in ovo ante dictum
<
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/>
eſt: </
s
>
<
s
xml:id
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xml:space
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">quare ex hoc perſpicue oſtenditur magnam vacui coa-
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cervationem in ſphæra factam eſſe. </
s
>
<
s
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xml:space
="
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">Non enim aëris corpo-
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ra, quæ relinquuntur eo tempore majora fieri poſſunt, ita
<
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/>
ut expulſorum corporum locum repleant: </
s
>
<
s
xml:id
="
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"
xml:space
="
preserve
">nam ſi augeren-
<
lb
/>
tur cum nulla ipſis ſubſtantia extrinſecus accedat, veriſimile
<
lb
/>
eſſet augumentum fieri per rarefactionem: </
s
>
<
s
xml:id
="
echoid-s183
"
xml:space
="
preserve
">hoc autem eſt
<
lb
/>
implicatio ſecundum evacuationem. </
s
>
<
s
xml:id
="
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"
xml:space
="
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">Sed vacuum nullum
<
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/>
eſſe dicunt: </
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>
<
s
xml:id
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xml:space
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">non igitur augebuntur corpora: </
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<
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