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# Title: Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light (shelfmark Leibn. Marg. 193)
# Folio 45, page id 1677894601:0217
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C.45
surther obserrable, that where they lye Aat uxon a
Pableandare turned about their Centers Whilstthey are
viewed through a Prism, ther will in fome poltures
extribit rares oF rarious Colours, and Pome ot them ex-
hibitthele ares in onc or trro positions only, but the
inost oF them do in all positions extribit ehem, and inake
ehem For the molt part appear almost all over the plates.
Phe reason is, thât the Tuperticies oF luch plates are nOL
even, but have many carities and Cvellings, erhich hon
hallon soerer do a little rary the thickness of the
Plate. For at the sereral sides of thole carities, For
the reasons nemly described, there oughe to be produ-
ced irares in sereral poltures ofthe Prilm. Now thoustr
it De Dut Fome verr Tinall, and HAETOIeE PaTtS OF thC
Cla(S, by erhich chese mares For the most pALL arC CaU-
led, vet ther may seem to extend themsetres over the
Wrhole Citals, Decause From the narrowest ot thole parts
there are COlOurS OF severat Orders that is oF several
Rings, contusedly reslected, which by retraction of the
Prilm are untolded, separated, and accordins to their
degrees ot retraction, dispersed to sereral places, (0 25 10
constitute (o mans sereral erares, a5 there vere divers
orders ot. Colours promiscuousty reflected From that
Part oF the GElaIS.
These are the principal Phaenomena ot thin Plates
or Bubbles, irhole explications depend on the pro-
perties oF Light, Wrhich Phare heretotore delivered.
And these rou sec do necessarilr Follon tromthem, and
aoree with them, eren totheir very least circumstances;
and not only (0, but do very much tend to their proot.
EhuS, by che 24th Obserration, it appears, that tIC
FayS