Baliani, Giovanni Battista, De motu naturali gravium solidorum, 1638

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              <s id="s.000239">PROPOSITIO XIX. PROBL. XI.
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                <s id="s.000240">Dato motus naturali gravis quomodocumque ad pun-
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                ctum datum, reperire seu in perpendiculari, seu in
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                plano quomodolibet inclinato punctum, a quo di-
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                gressum, perveniat ad idem punctum quo prius, tem-
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                pore aequali. </s>
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              <s id="s.000241">Sit AB linea quomodocumque aut perpendicularis, seu
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              planum inclinatum; super qua grave descendat in B, &
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              data sit quaecumque linea BC, aut perpendicularis, aut
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              quomodolibet inclinata, quae cum AB, coeat in B.
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              <s id="s.000242">Oportet in BC reperire punctum, a quo grave digressum per-
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              veniat in B tempore quo pervenit ab A in idem B.
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              <s id="s.000243">Ducatur AC orizontalis, & fiat BD tertia proportiona-
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              lis ad CB AB
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              , & D est punctum quaesitum. </s>
              <s id="s.000244">Quod ut probetur.
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              Per 11.
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              Sexti.
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              <s id="s.000246">Fiat iterum rectae AC paralella, & aequalis BE, & ducta
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              EA, secetur recta BF parallela ipsi AD.
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              <s id="s.000247">Quoniam AF, BD sunt pariter inclinatae, & aequales
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              , gra-
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              via per ipsas aequali tempore moventur
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              , ergo aequali tem-
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              pore ut per AB
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              , quod, &c. </s>
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              Primi.
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              pronun.
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