Nam conftat ex ibidcmdcmonftratis, quod fi Lens cava, velut C D (tit in fig, i. Iconif XVL vi.dcre hcet) ponatur in loco ordinario E, ita ut fociis ejus virtuahsconvcniat ciim foco fcu loco F imaginis convexx Lentis AB, cumradii a longinquo ita trajedi poft Lentem CD progredian-tur parallch ,…
Optics, Geometrical · Optical instruments
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