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Now* ff the Animadversor ccmtend, that alt the Rech äsld VelloWs cfthe one Liquor, or Blues and Indlcoes of the othef, are only Various degreesand dilutings of the fame Colouf, and not divers Colours, that is ä heggingof the QuelHon: And I fiiould as feon grant, that the two thirds or ffxt'hsin Mulick are büt feveral degrees of the läme Sound, and not divers Sotinds.Certainly it is much Better to bclieve our Sentes, informing us, that Red andYellow are divers Colours, and to rnake it a Philolöphical Qijerie, YVhy thetarne Liquor doth, according to its various thickneß, appear of thofe diversColours, than to suppole them to he the läme Colour, becaule exhibited bvthe läme Liquors? For, if that were a sufficient Realön, then Bluc and Yel-low must also be the (ame Colour, since they are both exhibited by the lämeTincture of Nephritick Wood. But that they are divers Colours, you vvi'imore fully understand by the realön, which in my Judgment is this: T l.cTincture of Aloes is quaüficd to TranCnit molt casily the Rays Tndued withRed, molt dirr.cultly the Rays indued with Violet, ar.J with intermediate de-grees of facility, the Rays indued with intermediate Colours. So that wherethe Liquor is very thiu, it may liithce, to intercept molt of the Violct, andyet tranlmit molt of the other Colours; all which together nutll cofnpound amiddle Colour, that is, a Faint Yellow. And where it is 16 much thicker, as al-16 to intercept molt of the Blue and Green, the remainingGreen, Yellow, andRed, mult Compound an Orange. And where the thicknels is 16 grear,that lcarce any Rays can paß thro’ it befides thole indued with Red, itmust appear of that Colour, and that 16 much the deeper, and oblcurev, byhow much the Liquor is thicker. And the läme may bd understood ofthe various degrees of Bitte, exhibited by the Solution of Copper, by reafonof its difposition to intercept Red molt casily, and transink a deep Blue or In-dico Colour most freely.

But (upposing that all Colours might, according to this Experiment,be produeed out of two by Mixture; yet it follows not, that thole twoare the only Original Colours; and that for a double Realon. First, Be-cäufe thole two are not themfelves Original Colours, but compoundcd ofothers; there being no Liquor, nor any other Bcdy in Nature, whole Colourin Dity-light is wholly Uncompounded. And then, becaufe though thofetWo were Original, and all others might be Compoundcd of them, yet it fol-lows not that they cannot be otherwile produeed. For 1 Lid, that they hada double Origin, the läme Colours to fenee being in lerne Calcs Compound-ed, and in others Uncompounded ; and lüfficiently dcclared in my third andfourth Propositioni, and in the Conclußon, by what Propcrties the onc mightbe known and distinguisti’d from the other. But becaufe I lüspect, by lorneCircumstances, that the Distinctiori might not be rightly apprehendet), I fhallonce more dcclare it, and further explaist it by Examples.

That Colour is Primary or Original, which cannot by any Art bc chang-ed, and whole Rays are alike Reffangible: And that Compoundcd, which ischangeable into other Colours, and whofe Rays are not alike Reffangible. Forinstänee, To know whether the Colour of any Green Object be Compound-cd or not, view it thro' a Prilrtl, and If it appear confuled, and the Edges

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