
and that which was before a Line, now becomes a Triangular Superficies, in which the pulse is not propagated at Right Angles with its Line of direction, but ascew; as I have more at large explained in my Micro= graphia; and that which makes Excursions on the one side, impresses a compound motion on the bottom of the Eye, of which we have the imagination of <u>Red</u> and that which make Excursions on the other, causes a sensation which we imagine a <u>Blew</u>: And so of all the intermediate dilutings of those colours: Now that the intermediate are nothing but the dilutings of those two primary, I hope I have sufficiently prooved by the Experiment of the two wedg-like boxes, described in my Micrographia. Upon this account I cannot assent to the later part of the Proposition, that Colours are not Qualifications of Light, derived from Refractions or Refections of natural Bodies, but original and connate properties. [text?]. To the second proposition I wholy allow, not exactly in the sence there meant but with my manner of expressing it, that is, that part of the splitt ray n<sup>ch</sup> is most-bent exhibits a blew, the n<sup>ch</sup> is least a red and the midle parts midling colours And that those parts will alwaies exhibit those colours till the compound motions are destroyed and reduced by other motions to one simple and uniforme pulse as it was at first And this will easily explaine and give a reason of y<sup>e</sup> Phenomena of the third proposition to n<sup>ch</sup> I doe readylie assent in all cases Except where the splitt ray is made by another refraction to become entire and uniforme, againe to diverge and seperate which explaines his fourth proposition But as to the 5<sup>th</sup> that there are an indefinet variety of primary or originall colours amongst which are yellow green violett purple orange [text?] and an infinit number of intermediate gradations, I cannot assent thereunto as Supposeing it wholly uselesse to multiply entityes without necessity since I have elsewhere showne, that all the varietys of colours in the world may be made by the helpe of two I agree
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Manuscript details
- Author
- Robert Hooke
- Reference
- RBO/4/45
- Series
- RBO
- Date
- 1672
- IIIF
-
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Cite as
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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