Bošković, Ruđer Josip
,
Theoria philosophiae naturalis redacta ad unicam legem virium in natura existentium
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nullam inde læſionem accipiant, ſed pacatiſſime quieſcant, & </
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vegetent, ac vivant.</
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ſententiam de
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emiſſione lu-
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minis præfe-
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rendam omni-
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no undis fluidi
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elaſtici.</
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gnis emittit, & </
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eſt eſſe effluvium quoddam tenuiſſimum, & </
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mentatione ignea vehementi excuſſus. </
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meo quidem judicio, argumenta ſunt, contra omnes alias hy-
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potheſes, ut contra undas, per quas olim phænomena lucis
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explicare conatus eſt Hugenius, quam ſententiam diu conſe-
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pultam iterum excitare conati ſunt nuper ſummi noſtri ævi
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Geometræ, ſed meo quidem judicio ſine ſucceſſu : </
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nis proprietates, aliis intactis prorſus, quas ſane per eam hy-
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potheſim nullo pacto explicari poſſe cenſeo, & </
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ipſi arbitror omnino opponi: </
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non eſt hujus loci, quod quidem alibi jam præſtiti non ſemel.
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tentia ex mea Theoria profluant omnes tam variæ lucis pro-
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prietates, quam explicationem fuſe perſecutus ſum in ſecunda
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parte diſſertationis De Lumine: </
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interea illud innuam, videri admodum rationi conſentaneam e-
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juſmodi ſententiam materiæ effluentis, vel ex eo, quod in in-
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genti agitatione, quam habet ignis, debet utique juxta id,
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quod vidimus num. </
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ut in ebullitionibus, efferveſcentiis, fermentationibus paſſim e-
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vaporationes habentur.</
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miſſio con-
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luminis, qua-
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rum reddenda
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eſt ratio.</
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ſtans, & </
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">ab æquali maſſa, ut ab eodem Sole, ab ejuſdem can-
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delæ flamma, ad ſenſum eadem intenſitate: </
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tas, nam ſemidiametrorum terreſtrium 20 millia, quanta eſt
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circiter Solis a Terra diſtantia, percurrit ſemiquadrante horæ:
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</
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">velocitatum diſcrimen exiguum in diverſis radiis, nam celeri-
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tatis diſcrimen in radiis homogeneis vix ullum eſſe, ſi quod
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eſt, colligitur e pluribus indiciis: </
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">propagatio rectilinea per
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medium diaphanum ejuſdem denſitatis ubique cum impedimen-
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to progreſſus per media opaca, ſine ullo impedimento ſenſibili
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ex impactu in ſe invicem radiorum tot diverſas directiones ha-
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bentium, aut in partes internas diaphanorum corporum utcun-
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que denſorum: </
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<
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mutatione medii, parte, quæ reflectitur, eo majore reſpectu lu-
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minis, quo obliquitas incidentiæ eſt major; </
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partis in eadem mutatione cum lege conſtantis rationis in-
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ter ſinum incidentiæ, & </
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">Cum bæc ſcriberem, nondum prodierant Opera Taurinenſis Acade-
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miæ: nec vero buc uſque, dum boc Opus reimprimitur, adbue
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videre po-
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ui, quæ Geometra maximus La Grange boc in genere protulit.</
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