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Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light, fol. 69

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: 0.93.

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The machine reads it as

  1. midale of che Colours, and chen the faint Fnds ot che
  2. Spectrum being remoretrom the Axis, cast their Species lels
  3. distinetlr on che Paper than cher vould have done had che
  4. Axis been successirely directed to chem.
  5. Now by nhac has been said ies certain, chac che RayS
  6. which differ in retrangibilicy do nor converge to the lame
  7. Focus, buc it cher Aon trom 2 lucid poinc, 25 Far From
  8. the Lens on onc sde as their Foci are one the other, che
  9. Focus of the most retranoible RayS PMaII BC nearer tO che
  10. Liens chan chac oF che least retrangible, by abore the four-
  11. ceenth pare oF che whole distance: and it cher Row trom a lu-
  12. cid poine, (0 very remore trom che Lens thar betore cheir
  13. Incidence cher may be accoinred Parallel, the Focus oFche
  14. most retrangible Rars Phall be nearer coche Lens than che
  15. Locus ofcheleastretransible, br about the 27th or28ch ParE
  16. oF cheir irhole distance From ic. And che Diameter oF che
  17. Circle in the midele space becreen thole trro Foei which
  18. cher illuminate when cher fall chere on any Plane, perpen-
  19. dicular eo che Axis Cirtrich Circle is the least into irtich
  20. chey can all bc gachered) is about che 55ch parc oF theDia-
  21. meter ot che aperture oF che Cla(s. So chac tis a wonder
  22. chac Telescopes reprelent Objects (0 distinet asther do. BUE
  23. ivere alt che Rays oF Lighe equally retransible, the Error
  24. arilins ouly from che sphericalnels ot che Figures oF Clastes
  25. vould be mans hundred times lels. For il che Object
  26. Class of a Telelcope be Plano-convex, and che Plane (ide
  27. be curned comards che Object, and che Diamerer ot the
  28. Sphere Whereotchis Clals is a segment, be called D, and chc
  29. Semidiameter oFthe aperture of the Clals bc called S, and
  30. che sinc ot lncidence out of Clals into Rir, be co the sine et
  31. Retraction a5 ItO R: che Rars which come Parallel co che
  32. axis oF che Cla(S, Chall in che Place where che lmage of the
  33. Object is mot distinctly made, be scarrered all orer a lictle
  34. Circle.

Cite

Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light, fol. 69. Machine transcription, not an edition: Leibniz Legible (model FoNDUE-GD_v2_ft_Leibniz, run 74). https://leibnizlegible.com/page/1677894601:0079?run=74