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Updated: May 8, 2025
Introducing the iodine-cell, and removing the alum, a broad space of the frozen coating is instantly melted away. Hence we infer that the snow and ice, which feed the Rhone, the Rhine, and other rivers with glaciers for their sources, are released from their imprisonment upon the mountains by the invisible ultra-red rays of the sun. Identity of Light and Radiant Heat.
Why is the human mind able to create? In a certain sense this question may seem idle, childish, and even worse. We might just as well ask why does man have eyes and not an electric apparatus like the torpedo? Why does he perceive directly sounds but not the ultra-red and ultra-violet rays? Why does he perceive changes of odors but not magnetic changes? And so on ad infinitum.
Now, the iodine, which proves itself thus hostile to the light, is perfectly transparent to the ultra-red emission with which we have now to deal. It, therefore, is to be our ray-filter.
Now, the alum is pervious to all the luminous rays; hence it cannot be these rays that caused the boiling. I now introduce the iodine, and remove the alum: vigorous ebullition immediately recommences at the invisible focus. So that we here fix upon the invisible ultra-red rays the heating of the water. We are thus enabled to understand the momentous part played by these rays in Nature.
Well, he got out his machine thing like a photographic camera, rather, on a tripod turned it this way and that until it pointed to my explosives, and pop! off they went like a lot of fireworks. Pretty neat, I thought." "Ah!" The Baron's elbow was on his desk and his head rested in his hand. "Then it is what that Italian fellow said he had discovered in 1914. 'Ultra-red rays, he called them.
The trial of Madame Caillaux filled the papers with animated reports and vivid pictures; Gregori Rasputin was stabbed and became the subject of much lively gossip about the Russian Court; and Ulivi, the Italian impostor who claimed he could explode mines by means of an "ultra-red" ray, was exposed and fled with a lady, very amusingly.
I have devised a method whereby the solar or electric beam can be so filtered as to detach from it, and preserve intact, this invisible ultra-red emission, while the visible and ultra-violet emissions are wholly intercepted. We are thus enabled to operate at will upon the purely ultra-red waves.
Three of von Stroeme's confederates had been nabbed at the same time, and a mass of papers full of important revelations not the least important among them being the fact that only yesterday von Stroeme had been caught dealing with a German Socialist of the ultra-Red variety, an official of the Bread and Cake-Makers' Union Number 479, by the name of Ernst Apfel.
Both effects are bound up together: in an incandescent solid, or in a molten solid, you cannot have the shorter waves without this intensification of the longer ones. A sun is possible only on these conditions; hence Sir William Herschel's discovery of the invisible ultra-red solar emission.
For example, one curious and very beautiful novelty brought to his notice by the development of this vision would be the existence of other and entirely different colours beyond the limits of the ordinarily visible spectrum, the ultra-red and ultra-violet rays which science has discovered by other means being plainly perceptible to astral sight.
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