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Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light, fol. 79

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: 0.90.

Original at the GWLB · Page image · Annotations (IIIF) · Download text

The machine reads it as

  1. aL. DII. L+00. Ll.
  2. To sorten Felescopes.
  3. ET ABDC represent a Clals spherically coneare On Fiz. 29.
  4. the Foreside AB, and as much conrex on the back-
  5. Side CD, Po that ic be every irhere ot an equal chicknels. L eF
  6. ic noc be chicker on one side than on the ocher, lest ic make
  7. Objects appear coloured and indictinet, and let it be very
  8. cruly irroushe and quick-silvered overon chebacksde; and
  9. sec inche Tube VXVZ which must be very black rithin.
  10. LeE FFC reprelent a Prism of Clals or Crystal placed near
  11. the ocher end of the Tube, in che middle of ic, by means ot
  12. 2handle oF BraIS OF ITON FOK, to che end ot ehich made
  13. Aac ic is cemented. Lec chis Prilm be rectangular aF F, and
  14. lec che ocher erro Anoles at F and O be accurately equal EO
  15. each ocher, and by consequence equalco halt righe ones, and
  16. lec the plane Cides FF and OF be square, and by conse
  17. quence the chird Side FO a rectansular parallelooram, whole
  18. lenseh is eo its breach in a Tubduplicate proportion ot ervo
  19. eo onc. Lec ic bc (0 placed in the Tube, thac che Axis oF
  20. thespeculum may pals chrouoh che midale ot the square
  21. lide F.F perpendiculartr, and by consequence chrouoh the
  22. midele oFche side F C ac an Anele oF 45 deorces, and lec the
  23. Side EF be curned tomards che speculum, and the distance
  24. oFchisPrim Erom che Speculum be such chac che Raysofche
  25. lighc PD RS, _cc. Wrhichare incidene upon the speculum in
  26. Tines Parallel co che Aris chereof may encer che Prism ac
  27. ehe Side FF, and be redlected by che side F G, and chence
  28. 50 oue ot ic chrouoh che side CF, to che poine Y itict
  29. must be the common Focusof the Speculum ABDC, and ot
  30. 2 Plano- convex Pre- Ola(s FI, chrouch ihich chole RayS
  31. must pals coche Frc. And lec che. Rays at cheir comins
  32. DuF

Cite

Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light, fol. 79. Machine transcription, not an edition: Leibniz Legible (model FoNDUE-GD_v2_ft_Leibniz, run 74). https://leibnizlegible.com/page/1677894601:0089?run=74