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Updated: May 22, 2025
We should be able to receive ideas of this order without incredulity since the advent of "dark" photography and the ultra-violet microscope. By aid of the latter, photographs are taken in absolute darkness, the lenses used being transparent to light rays invisible to the eye, but active photographically.
Not so uneven as they think!" Within battle range at last, Seaton hurled his utmost concentration of direct forces, under the impact of which three courses of Fenachrone defensive screen flared through the ultra-violet and went black. There the massed direct attack was stopped at what cost the enemy alone knew and the Fenachrone countered instantly and in a manner totally unexpected.
What he wanted, was a complementary color of ultra-violet, and I don't believe it is red green is the complement of red. Dr. Smith invited "knocks" with that foreword of his I hope I am complying, as an interested reader, and a hopeful scientist. However, my personal opinion has always been that "Skylark of Space" was the best story of scientifiction ever printed, without exception.
The richness of many of these faint nebulous masses in ultra-violet radiations, which are those that specifically affect the photographic plate, is the cause of the marvelous revelatory power of celestial photography. So the veritable unseen universe, as distinguished from the ``unseen universe'' of metaphysical speculation, is shown to us.
Our bisulphide of carbon, for example, which, employed in prisms, is so eminently suitable for experiments on the visual rays, is by no means so suitable for these ultra-violet rays. Flint glass is better, and rock crystal is better than flint glass. A glass prism, however, will suit our present purpose.
Ultra-violet, infra-red, pure heat, infra-sound, solid beams of high-tension high-frequency current in whose paths the most stubborn metals would be volatilized instantly; all iron-driven, every deadly and torturing vibration known was hurled against that screen; but it, too, was iron-driven, and it held.
The ultra-violet prominence spectrum was photographed for the first time from an uneclipsed sun, in June, 1891, at Chicago. Besides H and K, four members of the Huggins-series of hydrogen-lines imprinted themselves on the plate.
A variation of this class is that kind of partial materialization which, though incapable of reflecting any light that we can see, is yet able to affect some of the ultra-violet rays, and can therefore make a more or less definite impression upon the camera, and so provide us with what are known as "spirit photographs". When there is not sufficient power available to produce a perfect materialization we sometimes get the vaporous-looking form which constitutes our second class, and in such a case the "spirits" usually warn their sitters that the forms which appear must not be touched.
I sketched the arrangement of the veins standing out on that hand. I noted the same thing just now on the hand that manipulated the fake apparatus in the laboratory. Despite the difference in make-up Scott and Prescott are the same. "The invisible rays of the ultra-violet light may have blinded Mr.
The thought made him shudder. Was this, then, the explanation of his predicament? Somewhere he had read, not long before, a newspaper account of the investigations of certain Italian scientists, concerning the effect of the violet and ultra-violet light rays upon the cells of the brain.
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