Bošković, Ruđer Josip, Theoria philosophiae naturalis redacta ad unicam legem virium in natura existentium

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15 (III) 		16
16 (IV)
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17 (V) 		18
18 (VI)
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19 (VII) 		20
20 (VIII)
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            vitatis diviſum per radium circuli. </s>
            <s xml:space="preserve">Circulas deſcribi poteſt, quæcunque ſi
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            lex gravitatis, modo ſit æqualis in æqualibus a centro diſtantiis.</s>
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          <p style="it">
            <s xml:space="preserve">XXXIII. </s>
            <s xml:space="preserve">Quod ſi gravitas ſequatur rationem inverſam quadrati di-
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            ſtantiarum, mobilia circulos concentricos deſcribentia, velocitates babebunt in
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            ratione inverſa ſubduplicata diſtantiarum, & </s>
            <s xml:space="preserve">tempora periodica erunt directe,
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            ut radices cuborum earumdem diſtantiarum.</s>
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          <p style="it">
            <s xml:space="preserve">XXXIV. </s>
            <s xml:space="preserve">Si mobile viribus centralibus circa focum ellipſis volvatur,
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            vis gravitatis eſt in ratione reciproca duplicata diſtantiarum.</s>
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          <p style="it">
            <s xml:space="preserve">XXXV. </s>
            <s xml:space="preserve">Hujusmodi gravitas cum ad planetas tam primarios, quam
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            ſecundarios pertineat, motus eorum (quibus explicandis vortices Carteſii mi-
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            nime ſufficiunt) per ipſam eorum gravitatem ac vim projectilem recte exponi
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            poſſunt.</s>
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            <s xml:space="preserve">XXXVI. </s>
            <s xml:space="preserve">Ex iisdem principiis lunaris quoque motus inæqualitates, ac
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            anomaliæ explicari poſſunt. </s>
            <s xml:space="preserve">Actio enim ſolis, lunæ in terram gravitatem
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            minuit in Syzygiis, auget in quadraturis. </s>
            <s xml:space="preserve">Celeritas revolutionis & </s>
            <s xml:space="preserve">in Sy-
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            zygiis, & </s>
            <s xml:space="preserve">in quadraturis nullo modo perturbatur: </s>
            <s xml:space="preserve">Extra bæc orbitæ pun-
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            cta acceleratur lunæ velocitas, dum a quadraturis ad ſyzygias accedit, re-
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            tardatur vero, dum a ſyzygiis ad quadraturas progreditur. </s>
            <s xml:space="preserve">Hinc etiam fit,
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            ut orbita lunæ byeme, & </s>
            <s xml:space="preserve">dum terra in peribelio eſt, magis expandatur, con-
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            trabatur vero æſtate, terra verſante in apbelio, ex quo inæqualitas in tem-
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            pore periodico revolutionis conſequitur.</s>
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          <p style="it">
            <s xml:space="preserve">XXXVII. </s>
            <s xml:space="preserve">Apogæum lunæ debet progredi ſecundum ordinem ſignorum,
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            quando luna eſt in ſyzygiis, retrogredi, quando luna eſt in quadraturis.
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            </s>
            <s xml:space="preserve">Retrogradationem progreſſio ſuperat; </s>
            <s xml:space="preserve">binc ſola nobis ſenſibilis efficitur. </s>
            <s xml:space="preserve">Ex
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            boc motu variatio excentricitatis orbitæ lunaris conſequitur; </s>
            <s xml:space="preserve">Inclinatio or-
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            bitæ lunaris ad planum ecclipticæ, quæ varia eſt, motum in nodis lunæ efficit.</s>
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          <p style="it">
            <s xml:space="preserve">XXXVIII. </s>
            <s xml:space="preserve">Pbaſes lunæ & </s>
            <s xml:space="preserve">aliorum planetarum a varia illorum reſpe-
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            ctu ſolis & </s>
            <s xml:space="preserve">lunæ poſitione dependent. </s>
            <s xml:space="preserve">Ecclipſis lunæ contingit non niſi in
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            oppoſitione, & </s>
            <s xml:space="preserve">cum prope nodos luna verſatur: </s>
            <s xml:space="preserve">cum vero nodus lunæ vel in
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            ipſo conjunctionis loco, vel prope eum eſt, ecclipſis terræ, quam vulgo eccli-
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            pſim ſ lis dicunt, babetur.</s>
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          <p style="it">
            <s xml:space="preserve">XXXIX. </s>
            <s xml:space="preserve">Sol motu vertiginis circa axem convertitur, ejus maculæ
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            ſunt fuligo denſior in majorem molem concreſcens; </s>
            <s xml:space="preserve">Solis & </s>
            <s xml:space="preserve">lunæ actiones con-
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            junctæ in tellure noſtra, cum obverſam ſibi terræ partem magis, averſam
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            minus, quam illius centrum attrabunt, æſtum marinum efficiunt.</s>
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            <s xml:space="preserve">XL. </s>
            <s xml:space="preserve">Cometas planetis accenſendos eſſe probant eorumdem orbitæ regu-
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            lares; </s>
            <s xml:space="preserve">borum ſeu caudæ, ſeu barbæ, ſeu crines non aliud eſſe videntur, quam
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            exbalationes actione ſolis maxima copia excitatæ, & </s>
            <s xml:space="preserve">in averſam a ſole par-
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            tem propulſæ.</s>
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          <p style="it">
            <s xml:space="preserve">XLI. </s>
            <s xml:space="preserve">Motus diurnus Aſtrorum per motum vertiginis terræ, variæ
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            anni tempeſtates, dierum noctiumque viciſſitudines, varia longitudo per ter-
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            reſtris axis parallelismum, & </s>
            <s xml:space="preserve">inclinationem ad ecclipticam recte exponitur.</s>
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