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# Title: Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light (shelfmark Leibn. Marg. 193)
# Folio 59, page id 1677894601:0235
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=1677894601&page=235
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59
il it De desred to knoir the Diameter ot a corpulele,
irhich beinq oF equat densiey with Glass Mall refleet
oreen oF the third order; the number 16: Teirs it to
 Parts oF an Inch.
The greates difficuley is here to lenoi oc ivtat order
the Colour oF any Body is. And For this end ire must
have recourse to the ath and 18th Obserrations, From
irtence may be collected these particulars.
Scarlets, and ottier reds, oranses and yellores it chey
De pure and intense are most probably ot the lecond or-
der. Those oF the Aust and third order allo mar bc
preter sood, onls the vellor of the tirst order is taint,
and the oranse and red of che thurd order have a great
mixture et violet and blue.
There maz be 800d greens oF the Foureh order, but
the purest are ot the third. And of this order the sreen
OF ail regitables seem to be, partly ey reason ot thein-
tenseness oF their Colours, and partls becaule when
they rither lome ot them turn to a greenistr vellon
and others to a more pertect vellor or orange, Or Pei-
hraps to red, passins tirst chroush aIl the atorelaid in-
termediate Colours. Which chanses leem to be effected
by the extralins of the moisture wrhich mas leave the
cingins corpulcles more dense, and lomethins ausmen-
cedby the accretion oF the oyiy and carthy part et
chatmoilture. Nor theoreen wrichout doubeis ot the
ame order rith those Colours into ihich it changettu,
because the changes are gradtual, and thole COlOUrS,
chouxh ulually not very Full, vet are otten t00 Tull and
lively to be ot the tourth order.
Blues