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Updated: May 15, 2025
"Yes," he said, "I have seen a white, black, red, and yellow fog," and went off into a disquisition about optics, mediums, reflections, refractions, and all sorts of scientific terms.
It is this law of optics which has given rise to the lenses in our camera tubes, by which means we are enabled to secure a well-delineated representation of any object we choose to picture. When a ray of light passes from one medium to another, and through that into the first again, if the two refractions be equal, and in opposite directions, no sensible effect will be produced.
Indeed in the gross and complicated mass of human passions and concerns, the primitive rights of men undergo such a variety of refractions and reflections, that it becomes absurd to talk of them as if they continued in the simplicity of their original direction.
We represent also all manner of reflections, 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 kind; and amongst them some of metals vitrificated, and other materials, besides those of which you make glass.
It is this: that there are different sections of this Crystal, the surfaces of which, thereby produced, give rise to refractions precisely such as they ought to be, and as I had foreseen them, according to the preceding Theory.
"The true quantity of the moon's parallax," says Bonnycastle, "cannot be accurately determined by the methods ordinarily resorted to, on account of the varying declination of the moon, and the inconstancy of the horizontal refractions, which are perpetually changing according to the state the atmosphere is in at the time.
"What were the strange shadows and prismatic colours that kept passing across our table?" asked Bearwarden. "They were the obstructions and refractions of light caused by spirits trying to take shape," replied the shade. "Do you mind our asking you questions?" said Cortlandt. "No," replied their visitor. "If I can, I will answer them."
But this angle EAF is scarcely ever more than half a degree because the attenuation of the vapours alters the waves of light but little. Furthermore these refractions are not altogether constant in all weathers, particularly at small elevations of 2 or 3 degrees; which results from the different quantity of aqueous vapours rising above the Earth.
For he had received from somewhere, he knew not how or whence, a genuine prejudice in favour of Christianity, while of those refractions and distorted reflexes of it which go by its name and rightly disgust many, he had had few of the tenets thrust upon his acceptance.
His affection for her, his wife, lover, mistress, was a lens through which he sometimes looked out on the world. As she refracted the facts of life for him they presented themselves in the primitive old-fashioned way. But there was another window in his soul through which he saw life with no refractions whatever; remorselessly, logically.
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