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# Title: Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light (shelfmark Leibn. Marg. 193)
# Folio 75, page id 1677894601:0251
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=1677894601&page=251
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Asain, the refraction oF Camphire, Oyl. Olive, L int-
lecd OyI. Spirit ot Turpentine and Amber, wrhich aee
tat sulphureous unctuous Bodies, and a Diamond, Which
probabls is an unetuous substance congulated, have their
retractire porrers in proportion toone another as their
densties without anr considerable rariation. But the
retractire porer ot chese unctuous substances is tvo
Or three times greater in respect ot their densities than
the retractire porrers of theformer substances in respect
OF theirs.
Wacer has a retractire porver in a middle desree De-
Ereen chose tro Torts ot lubstances, and probablr is ot
a midale nature. Lor out of it gro all regetable and
animal substances, erhich consist as rell ot sulphureous
fat and inslamable parts, a5 oF carthy lean and alcali
2aLC OHCS.
Sals and Vitriols hare refractire porvers in a middle
decree betrrcen those ot curthy substances and Water,
and accordinsls are composed ot thole tiro lorts of sub.
Cances. For by distillation and rectification ot their
Spirits a great part of them soes into Water, and a sreat
Part remains behind in theform of a diy fixt carth ca
Pable ot vitrification.
Spirit oF Wine has a retractire porver in a midale
derree betrreen thole oF Water and oyly substances, and
accordinsly seems to De compoled ot both, united by
Fermentation; the Water, by means of lome Caline SpI-
rits rith irtich ris impregnated, dissolvins theOyt
and volatizins it by the action. For Spirit OF Winc 1S
inslamable by means oF its oylr parts, and beins dictil-
led olten From SaltoF Partar, srons by every dictilla-
tion more and more aqueous and Aesmatick. And
.1
Chymists