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Updated: May 15, 2025
Observing likewise that the different refractions of pellucid bodies produce in our eyes the different appearances of several colours; and also, that the different ranging and laying the superficial parts of several bodies, as of velvet, watered silk, &c., does the like, we think it probable that the COLOUR and shining of bodies is in them nothing but the different arrangement and refraction of their minute and insensible parts.
To the watcher in space, they were mere moving, snaky lines of barely distinguishable dots that shivered and seemed to writhe in the refractions of the air. Passing over them, seeming to pass almost through them in this strange perspectiveless view, were the shadowy forms of giant space liners, titanic streamlined hulls.
And the surface EK which all those waves will touch, will be the continuation of the wave AD in the sphere at the moment when the piece D has reached E. Now the line EK is not an arc of a circle, but is a curved line formed as the evolute of another curve ENC, which touches all the rays HL, GM, FO, etc., that are the refractions of the parallel rays, if we imagine laid over the convexity ENC a thread which in unwinding describes at its end E the said curve EK. For, supposing that this curve has been thus described, we will show that the said waves formed from the centres F, G, H, etc., will all touch it.
I pass now to the consideration of other sections of the crystal, and of the refractions there produced, on which, as will be seen, some other very remarkable phenomena depend.
And all this is still found conformable to our hypothesis, as any one can assure himself after I shall have shown here the way of finding the irregular refractions which appear in all other sections of the crystal, besides the two which we have considered.
You may haply call to remembrance a passage of the Jesuit Honorati Fabri, who speaking of perspectives, observes, that an object looked on through a small hole appears magnified; from whence he suggests, the casting of two plates neatly perforated, and fitted to look through, preferable to glasses, whose refractions injure the sight.
No one ever painted love so as fully to satisfy another: to some it is too florid to some too commonplace; the god, like other gods, has no likeness on earth, and every wave on which the star of passion beams, breaks the lustre into different refractions of light.
I found also the value of CG the semi-diameter parallel to the tangent ML to be 98,779. Now passing to the investigation of the refractions which obliquely incident rays must undergo, according to our hypothesis of spheroidal waves, I saw that these refractions depended on the ratio between the velocity of movement of the light outside the crystal in the ether, and that within the crystal.
We represent also all manner of reflexions, refractions, and multiplications of visual beams of objects. "We have also precious stones of all kinds, many of them of great beauty, and to you unknown; crystals likewise; and glasses of divers kinds; and amongst them some of metals vitrificated, and other materials besides those of which you make glass.
No one ever painted love so as fully to satisfy another: to some it is too florid to some too commonplace; the god, like other gods, has no likeness on earth, and every wave on which the star of passion beams, breaks the lustre into different refractions of light.
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