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Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light, fol. 8

Machine transcription. Not an edition. Errors are expected: about 8% character error rate on Latin and French lines, higher on German. Mean line confidence on this page: 0.91.

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The machine reads it as

  1. he FOcus oF che incidene Rays, che poine q Pall bc chc
  2. Focus oF che rellected ones.
  3. Cas. 3. Let ACB bC the retractin Surtace ot any
  4. Sphere nhose Center is F. In any Radius chereof L C
  5. produced boch mars rake F. T and Ct Sererally in Cuch
  6. Proportion co that Radius as the leller ot che sines ot
  7. Incidence and Retraction hach co che difference et those
  8. Sines. And chen il in che Came Line ron And any evo
  9. Points and g, (0 chac T ( bC EOF T aS F FEO t9.
  10. cakcins t q the contrary may trom tirhich T C liech From
  11. l, and it che Poine be the Focus ot any incidene RaYS,
  12. the Point g Mall be che Focus ot che retracted ones.
  13. And by che Came means che Focus of che Rars atrer
  14. ervo or more Reherions or Retractions mar be Found.
  15. Cas. 4. L et A C BD bc any retractins Lens, spheri-
  16. cally Conrex or Concare or Plane on cicher side, and let
  17. CD bC ies Aris (thac is the Line irhich curs boch ies Sur-
  18. faces perpendicularir, and passes chrouoh che Centers ot
  19. che Spheres,) and in this Aris lec F and fbc the Foci ot che
  20. retracted Rays Found as abore, irhen che incident Rays
  21. on boch Gidesthe Lens are Parallel cothe lame Aris; and
  22. uxon the Diamerer F f bilecced in F, describe a Circle.
  23. Suppole non chat anx Poine Q bc che Locus ot any inci-
  24. dene RayS. Dra LP curting che laid Circle in P andt
  25. and cherein cake t. g in such Proportion to + F aStF Or TF
  26. hathco TO. Lec tg lye che contrary way trom tirhich
  27. TO doih trom T, and g Thall. be the Focus of the retrac
  28. ced Rays ithout aur sensible Error, provided che Poinr
  29. Obc noc lo remore trom che Axis, norche Lens (o brond
  30. 25 eo makie any oF che Rars FaII too obliquely on che
  31. retractino Surtaces.
  32. And by che like Operations mar che reflecting or re-
  33. traccins Surtaces be tound nhen cherro Foci are giren,
  34. and
  35. . 6

Cite

Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light, fol. 8. Machine transcription, not an edition: Leibniz Legible (model FoNDUE-GD_v2_ft_Leibniz, run 74). https://leibnizlegible.com/page/1677894601:0018?run=74