Considerations of Mr. Hook upon Mr. Newton's Discourse of Light and Colours

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                                I Agree to the Sixth but cannot approve of his way of
explicateing the Seventh how the splitt ray being made
doth produce a cleare and uniforme light I have before  shined
that is by being united thereby from a Superficiall motion
which is Susceptable of two to a Lineary which is Susceptable
of one onely motion And tis as easy to conceive hon all
those motions again appeare after the Rays are again
splitt or rarified. He that shall but a little consider the
undulations on the surface of a small River of water in
a gutter or the like will easily see the whole manner curiously
exemplified

The eighth proposition I cannot at all assent to for the
reasons above and the reasons of the blen flame of
Brimstone of the yellow of a candle, the green of Copper
and the various colours of the Starrs and other Luminous
bodies. I take to proceed from quite another cause easily
explained by my former hypothesis

I agree with the observations of the Ninth Tenth and
Eleaventh though not with his Theory as finding it not
absolutly necessary, being as easily and naturally eplained
and solved by my Hypothesis

The reasons of the Phegnomana of my experiment which he
alleadheth is as easily solvable by my Hypothesis as by his, as
are alsoe those which are which are mencioned in the thirteenth I doe
not therefore se any absolute necessity to beleive his Theory
demonstrated since I can assure M Newton I cannot onely
solve all the Phenomena of light and colours by the hypothesis I 
have formerly printed and now explicate them by, but by two or
three other very differing from it & from this which he hath
described in his ingenious discours

Nor would I be understood to have said all this against his
Theory as it is an hypothesis for I doe most readily agree with
them in every part thereof and esteeme it very subtile and
ingenious and capable of solveing all the Phenomena of colours
but I cannot thinke it to be the onely hypothesis nor soe
certaine as Mathematicall Demonstrations

But grant his first proposition, that Light is a body and
that as many colours as degrees thereof as there may be, soe many
sorts of bodys there may be all which compounded together would
make white
                            
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Manuscript details

Author
Robert Hooke
Reference
RBO/4/45
Series
RBO
Date
1672
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Considerations of Mr. Hook upon Mr. Newton's Discourse of Light and Colours, 1672. From The Royal Society, RBO/4/45

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