lis gradibus inclinationis ;five angulus quiscunque refradus quaeratur ab aerc in vitrum, ftve a vitro inaercm : femper cnim, {utfmm dati anguli inclinationisadfinumanguli Refra-eii.ita eritfmmalterius cujmvis anguli adfmum anguli refraBi^ qui quAritur,)operandumeritquodverdoperatione fada… … I F; ^!| ii i 6 Vundamentum 1 IMAthematko-Dioptrkiim, * in vitro potius organice five inftrumentaliter inquirenda eft, quam rationeulla posfitinveftigari. Quocirca plures ab Authoribus modi funt excogi-du?RefM- tati, quorum aliquos adducit Vechales DioftM. i.prop,:^. Kepleri camen mo-«ionem…
Optics, Geometrical · Optical instruments
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