14694THEORIÆ
alteram OF, &
vertices ejuſmodi normalium determinarent bi-
nas ſuperſicies quaſdam continuas, quarum altera exhiberet vi-
res in directione C D attractivas ad D, vel repulſivas reſpectu
ipſius, prout, cadente O citra, vel ultra C, normalis illa fuiſ-
ſet erecta ſupra, vel infra hoc planum; & altera pariter vires
perpendiculares. Ejuſmodi locus geometricus, ſi algebraice tra-
ctari deberet, eſſet ex iis, quos Geometræ tractant tribus in-
determinatis per unicam æquationem inter ſe connexis; ac data
æquatione ad illam primam curvam ſiguræ 1, poſſet utique in-
veniri tam æquatio ad utramlibet curvam reſpondentem ſingu-
lis rectis DC, conſtans binis tantum indeterminatis, quam æ-
quatio determinans utramlibet ſuperſiciem ſimul indeſinite per
tres indeterminatas.
11Fig. 22.234nas ſuperſicies quaſdam continuas, quarum altera exhiberet vi-
res in directione C D attractivas ad D, vel repulſivas reſpectu
ipſius, prout, cadente O citra, vel ultra C, normalis illa fuiſ-
ſet erecta ſupra, vel infra hoc planum; & altera pariter vires
perpendiculares. Ejuſmodi locus geometricus, ſi algebraice tra-
ctari deberet, eſſet ex iis, quos Geometræ tractant tribus in-
determinatis per unicam æquationem inter ſe connexis; ac data
æquatione ad illam primam curvam ſiguræ 1, poſſet utique in-
veniri tam æquatio ad utramlibet curvam reſpondentem ſingu-
lis rectis DC, conſtans binis tantum indeterminatis, quam æ-
quatio determinans utramlibet ſuperſiciem ſimul indeſinite per
tres indeterminatas.
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