Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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lium, vt ex hac hypotheſi euidenter concludatur cor
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pus magis graue tardius
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minus graue. </
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Cap. 10. de
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æquitempo
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ranea natu
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rali veloci
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tate
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grauiũ
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<
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">Hoc elegantiſſimè demonſtratum fuit à Galileo in
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noua ſcientia mechanica dialogo primo.
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Nouæ ratio
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nes pro Ari
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ſtotele ad
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ducuntur.</
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">Sed licèt ea, quæ huc vſque dicta ſunt, euidentiſſi
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mè ſuadeant non habere velocitates corporum de
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ſcendentium eamdem proportionem, quam habent
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grauitates eorum, adeſt tamen vir clariſſimus, qui
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abbr
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sẽ-tentiam
">sen
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tentiam</
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peripateticam ſuſtinere conatur. </
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<
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ratum eſſe virtutem grauitatis efficientem cauſam eße de
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ſcenſus corporum grauium, & quia imposſibile eſt vt motus
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deſcenſus abſque aliqua velocitate fiat, igitur eadem graui
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tas, quæ deſcenſum producit, erit quoque cauſa effectiua il
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lius velocitatis, quæ naturali eius deſcenſui competit, cùm
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que gradus grauitatis non ſit vnicus, ſed augeri, & dimi
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nui in infinitum posſit, igitur est imposſibile vt gradus gra
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uitatis ſummoperè diuerſi inter ſe, & inæquales eumdem
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effectum producant, ſcilicèt eamdem præcisè velocitatem,
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neque videntur negari poſſe prima principia notisſima, quæ
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ſuadent omnium virtutum, & facultatum, quæ effectus
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aliquos producere poſſunt, illam, quæ maiorem vim habet,
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maiorem effectum producere;
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ſubſequitur poſtea:
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I.</
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II.</
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Constat experientia ponderis in altera stateræ lance poſi
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ti, illam, quæ ex aduerſo eſt, celeriùs attollere, quàm ſi in
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æqualitas minor foret. </
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dus</
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grauius machinæ illud vertenti appenditur: horologij
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quoque curſum ſimili ponderis adiectione citatiorem fieri.
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III.</
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<
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">Ait quòd
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ab experientia non docemur breuitatem vndu
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lationis in pendulo leuiori à ſolo medio, non autem à graui-
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