Gassendi, Pierre, De proportione qua gravia decidentia accelerantur, 1646

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1eiuſdem rectæ CD attollatur ad G, inde liberè dimiſſus,
pari
modo ad eandem rectam CD, aut proximè ad eam
conſcendet
verſus H. Jmò, ſi ex F ſuſpenſus attollatur ad
I
, inde feretur, vſque ad K.
Per diuerſos igitur illos arcus
decidens
globus, ſemper ad æqualem altitudinem conſcendit.
Ergo è quolibet deſcenſu æqualem acquirit impetum; niſi
enim
eſſet impetus æqualis, globum ad æqualem altitudinem
non
attolleret.
Quid ni igitur idem quoque faciat globus,
ſi
per plana CB, GB, IB deſcendat? Credibile igitur
etiam
eſt globum per illa, aut ſimilia plana decidentem, æqua­
lem
tali deſcenſu impetum, ac proinde æqualem quoque ve­
locitatis
gradum acquirere.
Subinde autem, vt oſten­
das
quàm hæc ſint incerta, incohæcentia, &c. Impri­
mis
quidem neſcio, inquis, an globi ea, qua vult Galileus
ratione
ſuſpenſi, ac librati alitùs in Etruria, quàm in Gal­
lia
aſſurgant; at heic neque tam propè ad horizontalem li­
neam
, neque per diuerſos arcus ad eam æqualiter accedunt.
Nempe filo pedum quatuor cum dimidio ſuſpenſus globus ad
lineam
horizontalem tribus infra centum pedibus deſcriptam,
propiùs
quàm duobus digitis nunquam acceßit.
At centro
nouem
tantum digitis ſupra lineam horizontalem accepto,
filóque
duorum pedum conſtituto, iam globus ad lineam ho­
rizontalem
vno digito, quàm anteà propiùs acceßit.
Vbi
verò
centrum ſeptem infra lineam horizontalem digitis aſ­
ſumptum
est, vix ad quatuor à linea horizontali digitos
globus
aſcendit.
Concludis idcircò his verbis, Qua
igitur
fide Galileus tam aſſeueranter ait globum ita ſuſpen­
ſum
, ac per quoſcumque arcus librarum, ad æqualem ſem­
per
altitudinem aſſurgere?
aut quomodo ex re adeò euiden­
ter
falſa petere auſus eſt testimonium veritatis?

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