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# Title: Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light (shelfmark Leibn. Marg. 193)
# Folio 15, page id 1677894601:0187
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=1677894601&page=187
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15
Air, asthe Sies alC trhich meature the retraction made
out oF that medium into AIT.
OBS. XI.
Vhen the Water as betreen the Cilases, iF L PTCS
led the upper GlaIs variously at its edses to make the
Rines more nimbly from one place to another, a little
ertite Spot vould immediatelr tollo the center ot
chem, irtrich upon ercepins in oE the ambient Water
into that place vould presenely vanit. LES appearanCe
Wras Tuch as interiacent Air vould have caused, and it
extribited the Tame COlours. But it ras nat AII, FOr
irhrere any bubbles oFAir vere in themater they mould
not ranistr. The reffexion must have rather been caused
by a subtiler medium, irhich could recede throush. thc
Gilasses at the crcepins in ot the rater.
OB5. XII.
These Obserrations rrere made in the open AIr. BUF
Further to examin the effects ot coloured Lighe Fallins
on theGrlasses, Idarkened the Room, and viered them
by rellexion of the Colours ot a Prism cast on a Sheet
oF irhite Paper, my Pye beins (0 placed that l could.
sec the coloured Paper br reflexion in the. GilaBeS, 25.
in a Lookins- sla(s. And by this means the Rings BC-
came distineter and risible to a far greater number than
in the open Air. Ihave Pometimes seen more than
civenty ot them, whereas in the open Air L could HOC
disceen abore etCHE OF NINC.
d ad