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# Title: Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light (shelfmark Leibn. Marg. 193)
# Folio 65, page id 1677894601:0075
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=1677894601&page=75
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# Lines: 34 recognised, mean confidence 0.92
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Lines distinctir, and chen considered whether che disse-
rence of chole distances bear such proporrion eo s: Tnches,
che orearest difference ot the distances which che Foci ot
che decpest Red and Violet ouphe to hare From the Lens,
25 che distance of che obserred Colours From one anorher
in the Spectrum Bear coche like distance ofthe deepest Red
and Violet measured in the rectilinear Cdes of che Spect
rum, chac is, co the lenorh of thole sides or excels ot che
lerisch oF che Specerum abore ies breadch. And my Ob-
Serrations ivere a5 FollOms.
Wlhen Lobserred and compare d the deepest sen sible R ed,
and che Colour in che contine of Crcen and Bluc, wtich
ac chac rectilincar sides ofthe Spectrum as distane From it
halt che lenoch ofchole sides, the Focus where the contine
oF Creen and Blue cast che Species of the Lines distinctly
On the PaPEF, WaS nearer to the Lens chen the Focus ihere
the Red cast chose Lines dictinctly on ic by about 2 = OF
23 Tnches. For Comerimes che Nealures vere a lirele grea
cer, Cometimes a licele less, buc seldom varied From one
another above : ot an Inch. For ic was verr difticule co
detine che Places of che Foci, wichoue Pome licele Frrors.
Noi il che Colours distane half che lenech oF che Image,
(measured at its rectilinear Sides) give 2= Or 23 difference
oF che distances oftheir Foci trom the Lens, thenthe Co
Jours distane che whole lenoch ought to gire 5 Or 5: Inches
difference ofthole distances.
Buc herc ies co be noced, that L could nor sec the Red
co the tuil End oF che spectrum, bue only eo che CCnFEF
oF che Semicircle wrhich bounded thac End, or 2 licele Far-
cher; and cheretore l compared chis Red noc wich chat Co-
Tour irhich was exactly in che midele ofthespectrum, or
contine oF Creen and Blue, buc rich chac which verged 2
licele more co che Blue chanro the Creen: And a5 l reck-
Onec