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# Title: Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light (shelfmark Leibn. Marg. 193)
# Folio 115, page id 1677894601:0135
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=1677894601&page=135
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TTB
passins into one another, as they do irhen made by
PTISIS; ThC CITCUIFCTeNCO D F. LGFABC D, represen-
tins the wrhole series ot Colours From one end oF the
Suns coloured Image to the other, (0 that From D to f.
bc al degrees of red, at l. themean Colour betreen red
andorange, Erom F. 10 Lall desrees oF OransC, ac F the
inean betreen oranse and vello, From L t0 C aIl de-
srees oF vellorr, and (0 on. P et p bc the center ot
Srarity oFthe ArCh DH, and 9, E, Sq C, V, Z9 thC centers
ot grarits oF the Arches FL, FC GA, AB, BC.
and C. D respectirely, and about thole centers ot gra-
viey let Circles proportional to the number oF rays ot
each Colour in the siren mixture be described; that 15,
the circle p proportionalto the number oF the red. ma-
kins rars in the mixture, the Circle q proportional to
che number ot the orangemakcins rars in the mixture,
and (ooF therest. Find the common center of gravitr.
OF all those Circles P, G, 1, S, C, V, Z. L et that center
bCZ; and From the center ofthe Cirele ADF, throueh
Zto the circumterence, dramins the rishit line L,
the place ofthe point P in the circumterence MaII MCW:
the Colour aritins From the composition oF aII the CO-
lours in the siven mixture, and the line OZ Mall. DC
proportional to the tulnels or intensene(s of the COlour,
that i5, t0 its distance from irhiteness. A5 it YFaIL in
the midele Detireen F and C, the compounded Colour
MalI bethe best vello; il Prerse trom the midale to-
rards L’Or Cr, the compounded Colour Mall accordins
ly be a vellorr, versins torarde oranse or sreen. IIL
tallupon the circumterence the Colour Mall be intenle
and Rorid in thehighest degrec; it it Fall in the mid
vay betveen the circumterence and center, it Mall be
BUE