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Lexicon Technicum: Or, An Universal English Dictionary Of Arts And Sciences, fol. -

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  1. C A, C B: Thacis, inthe Rario oFche Retraction principallr proved trom Refractions, by wtrich chele
  2. Siven.
  3. distinct Species are separared one trom anocher; f0
  4. BY cc Construction also, che Angle of Inci. Blue or Purple Lishic is For Inttance more retracte
  5. dence R BF, hach iis correspondins Retracted in passins chroush a Diaphanous Body; chan Ye)
  6. Ansle R A F: Wheretore sincetheir Moments are loir or Red. (Scc the Words Lisht and Colour
  7. in che Racio propoled, thole are che Ansles Coushe Where Phave siven vou a larse ACCONNE OF MF
  8. Ot required:
  9. e
  10. Nemtons Experimenes, as menrioned in his Lerter
  11. Non Etieretore mulrixlrins he Reracted Angle inche Phil. Trans. N. 80. Cc.)
  12. by che Number of tiefserions auginented by Vni-
  13. er, and trom ehe Produe Subcractins the Ansle of
  14. Ic beins cheretore certain chac all kind or degrees
  15. Ot blue Lishit, arc a lictle more retracted chan an
  16. Incidence, roi will have hials che distance oF che reddim Liglic whatloevor, Tis plain, laitk MII
  17. tris From iic Sun, it chenumber of ReAexionsivere FTolley. thac tromthis disterence the Breadch ot the
  18. eren; bur il chey vere odd, from che opposite
  19. Point oF the Sun, as Was said betore.
  20. Tris must arile; but wrhich, is hardly eo be deter:
  21. minedby Obserration, by reaton of. the uncertair
  22. And From hence, by a very easie, Bore, and ele Limits oF the Colours inthe Clouds. Bur the prea
  23. sane Construction, he ses hor ro exhibic r0 rer che Rario ot Inequalier between C A and C D
  24. che Fye, the Incidencos of aIl manner of Triss, as or the orearer the Ketraction is, by (0 much che
  25. eher vill appeae in any Liquor wtose Retraction frearer will che Distance be oE ans tris trom che
  26. iS given. FOr, if etie Line AC in che last Figure, Sun; (0 thar those which are more remore FrOm
  27. be bissected in F, have a Third pare cur of trom ehie Sun, are alvars more adorned wich a Purple
  28. it in c, a Pourrh parr in B, 2 Fisch pare in n, 696.
  29. Colour, buE the more near ones with a Red one
  30. And etien there be Semicircles described on the as is apparene in che Primary tris, which ranistres
  31. Diamerers AH, A e, AE, An, _C. alI Which MaH Or dilappears in Opposito Solis, it che sine oE Tnei-
  32. De cur by ehe Oircular Ark DBB, and v, described
  33. on e Centre C twich the Radius C D, (Wrtict
  34. Radius CD is ro A C in the Racio oF the siren RC.
  35. Fraction) in the Points B b, B~, _C. Y (aY, the
  36. Lines AB,, Ab; AB, A v. Mall make wich the Linc
  37. dence to chac of thé retracted Anele bC aS C ALG
  38. CF: : Or a5 2. 20r. And it che Ratio bc grearer
  39. chan chis, the Primary Iris Will noc be at all visible,
  40. or noPrimaey Iris ac all can be scen.
  41. Ir is to be obserred allo, Thac rhe Secondary Tris
  42. A C, Ansles equal ro thie retracted Angles, and Will 30 oR in a Point, in Opposito Solis, Wvhenerer
  43. vich che ladii C B, C B, C B, C v, respectirely
  44. Angles equal cothole ot Incidence required; thac is
  45. AB C (Or rather is Complement ro a Semicirele)
  46. For the Primary Tris AB C For che Sccondari one
  47. AB C. For the Third, anid A ~ C For che Fourrh, (5c
  48. and (o on a5 tar as vou pleale.
  49. FC Mes also, Thatthe Reader it still d in AI-
  50. sebra, mar casily find these Angles by Accurare
  51. Calculation, derired From che Pame Fountain:
  52. Thus, Let the Radius be = r. and rhe Ratio ot
  53. Retraction, asr 20s; ihen will chc sine ot Inci
  54. dence be = = = bur che Sine oF the RC
  55. Eractec, Anele vill BC V
  56. nhich Aneles che Primay lris will be Coundl.
  57. For che Seconed tris V 3
  58. Sine oF Incidence; and 4
  59. 5 Wwill bc l
  60. be che sine or che retracted Angle. And (o on, as He
  61. Further CheWs.
  62. And il rou procced to Calculare accordine, 10
  63. D. Carres his Proportion, the Primarr Tris will be
  64. Dictane ab Opposito Solis, 47 30, che Secondary
  65. Onc Sro 55. But che Third and Fourrh will bc
  66. distant 40 20, and 45 33 From thesunhimsett:
  67. Dur probably no onc can erer sec cither ot these
  68. For the realons abore siven.
  69. AS EO che Colours wich wtich chis wondertul
  70. Bour is adorned, he oblerres, Thac our most Sa-
  71. Bacious BIr. Nemton as the hrst Wvhio Meved by
  72. most plain Fxperimenes, chac che Rays oF Listre do
  73. nor come uniform, and simple out ofche Luminous
  74. Body; buc chacche purewhire Lighe irhich ve
  75. sec, is compounded ofthe C’orpusclos oF all manner
  76. of Colours, blended one vith another, by the most
  77. rapid Morion; and, Thac the ColourS oF aII BO.
  78. dies arise trom their disserent Dispostions to retract
  79. rettect tome peculiae drecieo ot Lighc. Ilio 1s
  80. the Rario oF Retraction is 25 T. 1O L un
  81. Or 25 X 100. 847487. And trom thence will rum
  82. back romards che sun himselt, and chere dis
  83. appeas, il he atorelaid Rario bC 25 3TOL, OF 25
  84. CAtOC C
  85. Found in all knovn Fluids, exCepE AIF) the greateN
  86. the Rario oF Retraction, the turcher is the lris di-
  87. Aane ab Opposito Solis, or rather From the Sun hiiss
  88. TCIF. che Ark beinq numbred berond che Semirirele
  89. 20 C n, ihe lris will ranith into the Sum MIIICH;
  90. ics resrels co rhe Sur, as chey vere riehr or direct ac
  91. cheir Rorels.
  92. And Tromihehceit is chac che Primary and Fourch
  93. Tris in Nacry Clouds, obverrs a reddism Colour to-
  94. vards che sun; buc che secondarr and Third.
  95. Purple onc.
  96. IAHCK ThIS, MIr. Falley Biers hou, tavire che
  97. Distance OFehie Eris From the Sun, ro sird chie R2
  98. rid oErhe Retraction; and etiis by a very eatie, but
  99. not recgnie nse uen
  100. i scom
  101. vil
  102. BHE IN FhC LRFCTHICCTALE LLOPOTHOHS, (WHICR arC
  103. and cheretore the Lolours ill appear to be touna
  104. in an order diverle Fromehac in ehe Primats MMs
  105. untels rou lius reckon the distance ot the Secon-
  106. dars one trom che sun himsett, which muse allo be
  107. caken norice ot inthe ocher Tris
  108. The Third tris in Oppossto Solis, is quite contu-
  109. Sed; che Ratio oF the Retraction beins aS L W
  110. 91855, and from ehence it runs back in che Rario
  111. Ot 11068250, trom ivhence again, the MaeF Ot
  112. che Couurs beins reltored, in ihe Rario oF 4 10L.
  113. Ox Ot C A +O C e, ic ends in Opposiro Solis.
  114. But che Fourch Tris BeximIs trom che sun in
  115. che Ratio oF Rqualier, passes of in the Loms op.
  116. Posire e0 him in che Ratio OF r 10 94895, anc
  117. thence returns corhe sun aģain, if che Ratio bC 2
  118. 10 4, and trom chence is aga in dispersed or scar-
  119. rered colatus the Pares opposite to chie Sun, in hE
  120. Racio ot r 1056337, wictim which Boundsare che
  121. ReFraCCIII et all Hnomn Fluids contained.
  122. LaIEIV, TF The RarIO Wvere aS GEO L, OF aS C R
  123. and the L BIOMs lo appearance will De inverced, ac

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Lexicon Technicum: Or, An Universal English Dictionary Of Arts And Sciences, fol. - . Machine transcription, not an edition: Leibniz Legible (model FoNDUE-GD_v2_ft_Leibniz, run 74). https://leibnizlegible.com/page/806933011:0694?run=74