Lexicon Technicum: Or, An Universal English Dictionary Of Arts And Sciences, fol. -
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- Coloux is one and the lame, Whertier ic be WMce, quenly all che rarieey of Colours depend uxon the
- Composicion oE Lishe.
- Prop. TII. Problem.
- Lo detine che Retransibiliry oF che leveral POrrs
- ot Hlomogeneal Lishr ansverins rothe sere-
- ral Colours.
- In ehis ihe Auchor is very curious and exact,
- Mevino che LaWS OF the Retractions ouF OE GlalS
- inco Air, Whence by the 3 AXioms oF his ArA BCOK
- che Lars of Retraction our ot dir into Clals are
- easiy derired. And finding by Eixperimene, char
- erhen Lighr zoes out of dir chro leveral contipuous
- retractins Mediums las chrouxh Wacer and Ca (5)
- and thence poes out again into Air, Wwhecher che
- Rehracting Surtaces be parallel or inclined coone
- another; Thac LigHE, a5 OTren aS by CONTPArY Re
- tractions tis lo corrected, as that it emergert in
- nels of che emersins Lishe, will by degrees, in
- passins on trom rhe place ot Lmergence, become
- can eacher rwo Theorems (which he chere sives
- and by Which che Retractions ot che Rars ot eve.
- Ey COrE, made OuE OF any Medium inEO RIr, are
- tinoun by havine ehic Retraction ot che Rays OE
- one Corr; and allo rhe Retraction out ot one
- Medium into anocher, may be trad as often a5 yov
- Again, a Lens beine placed abour 8 Feet from che chird Medium. And chele Theorems, it admit.
- red into Optickes, Would sire a scope ro rrear rhar
- Subjeet voluminousy atEer a neW ManNeE, nOK
- chearically ail kinds ot Phaenomena ot Colours
- pohich could be reduced by Retraction.
- Prop. IV
- Colours may be produced by Composirion whict
- MalI be like che Colours ot tlomopeneat
- Lighr, as co the appearance ot Colour, bur
- noc as co che immutability oF ic, and che C on
- Picurion of Lighe; and chole Colours, b.
- hon much more cheyare compounded, by se
- much are chey lels fuil and incense, and B.
- 100 much Composicion they may be dilures
- and weaken d, cilt chey cease. There may
- also Colours be produced by Composicion
- erhich are nor cullys lile any ol che Cotours ol
- Hlomogeneal Listic.
- Fellon, CTanee, et scu, ae in che midale ot
- che Emeroins Liphe, Wherechere sho Contine o
- Shado ac all, che C0 our is else tety lame a5 at
- the Edges; che Whole Lighe ac ies enctance
- ot one unitorm Colour, Wvhechet Wce, Lelto
- Cranse, or. Red, and soins on eltence perpetually
- without any chanse ot Colour, luclt as che Contin
- oF Stadon is rulpariy suppoledro work in its Re.
- tracted Liche ac iis limersence.
- Bleicher can chele Colours dise Hom any nem
- Modisicarions ot rhe Lighe by Retracts, a
- cause ches chanse luccessively trom Wielo Le
- de, Oranse, or Red, ivhie n slenactions re-
- am che lame, and allo becaute ene Retractions
- are made contrary ways by Palatel Superficies
- Which deltroy one anochers Lfects.
- He Mews allo in Experiment the FIrI OF This 20
- policed abour 20 Feec trom che Hlole ot a aarkned sene Rays be inclined co che Incident, che Wrhire
- Koom, vou may lo incercepe che Rays ac their
- Antrance, as torake away ary one Coiour (which
- Spectrum or caoured Image, and lenre He Me le
- mainine; Which ewrs Chac all Colours tave an
- Indifference ro any Contines oF Stadow, and
- cheretore che Difterences ot chese one from ano-
- cher donc arile trom the diffetem Contines ot
- Stradow, Whereby che Lixhe is rariousy modesta
- B00k, Thac by applyins an lron Wire, or such Lines parallet eo chole in whien ic as inciden
- like Body, eo a prover parr ot a very larse Prilm conrinues ever after ro be Whire: Bur it the emer
- vou pleale) cicher whol. y Or in part, our ot checinsed in ics Rdges vith Colours. Ile chinks he
- as hach hicherro been the Opinion of Philolophers. hare che Retractions our ot chem boch into an
- Prilm, ac the Hole, had a Paper placed in ils lo-
- cus; Wrhich erhen ic as sicuace perpendicalar to
- arten very much oblique, appeared Zellon and perfection ot Vition, bur allo by decerminine Ma
- Red, Wrhen inclined onc way, and Blue wrten
- rurned another; and yet here che Contines ot
- Lighe and Stradon, and che Retractions oF che
- Prum remained in aII Cases che same: And che
- Reaton ot che Phaenomenon (he Mews) is chis:
- Tharche Paper in onc Posture beine more oblique
- roche more Retrangible Rays, than eo the lels, i
- more Aronsly illuminared by che lacrer chan by
- the former; and cheretore che less Retrangible
- Rays are predominane, in the Reflected Lighe, and
- ahere ever chey are so, they cinge rhe Lighe wict
- Vellou or Red; 2s when the P’aper beins placee
- in che concrary ay, and in an oblique Polture, the
- more Retransible RayS BCCOMC PTCHOMIManE; ade
- 15
- che Lighe appeared ot ies omn eolour Whire; bur ontr by ceachins rhose chines which rend co che
- they alvays ringe the Lixhe wich Blues and Violet
- 6o0l0
- All Flomogeneal Liphe hach ils proxer Colour
- ansiverine ro ies degree ot RetrangioIs
- and chac Colour cannor be clans cu vy RC.
- Aexions and Retractions.
- This is plain by Experimene, for alter he had
- separated the several lorrs oF RayS one from ano.
- ther (as he Mens hor eo do in che Eaperiments be-
- thac means sor a quanciry ot Hlomogeneal Lishe; che Lole ot a darhenea Room, the Liehe in the
- ehis Spor of Hlomoseneal Lighe as atrerwards un, Locus ot ehe Les Converged, and chere made;
- capable ot beins changed by cither Refraction or sbriohe Spor, Wwhich Tccee N d irtire Paper
- Restexion, and a il Bodies placed in thac Hlomose- chere, ale in a riste or normal Posrion co ihe
- neal Lishe Aill appeared ot ies Colour, hoverer Rass, appeared Whire on che Paper; bur it ei
- ditterent cheir eun proper Colours vere from chac.
- drem wbence he concludes, Thac it chie Surs
- Fiphe consisted bur ot one Corr ot Rays; there (to axpear Cea wich the ulual Colours OF che
- avould be bur one Colour in the wholeWorid; Pritu on the reason oE its appearine Wrhire
- nor vould ir be posible eo produce any ne Co-
- Whicenels, and sll Crey Colours becween
- Wie and Black, Ma) be componnded o
- Ocher Colous; and ihe Whicenels of rhesun
- lours mix d in a due proportion
- This he proves by many lxverimenes, and in
- Parricular, by chis; Phac à Lens being placed re
- Liehe is compounded ot all che primary C0.
- cher che P’aper be moved rowards the Flole or Bc.
- hind ihe Focus oF the Lens, ic will presenely begir
- ac the Focus, Was, becaule chere all The Rays vere
- Out D. Credexions und Botcactions; ade ChilE. sexactiys mineled; t il any C0. ouc, luppolo ic
- Ret
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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/806933011:0197?run=74