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Updated: June 5, 2025
And make sure that they continue to call you Lord-Master Proconsul." Lecturing, he found, was dry work. He summoned a bartending robot: "Ho, slave! Attend your Lord-Master!" Then he had to use his ultraviolet pencil-light to bring it to him, and dial for the brandy-and-soda he wanted. As long as that was necessary, there really wasn't anything to worry about.
From his hassock in the center of the room he looked uneasily around. "Say, did that violet tone in the glass come from the high Cleveland hydrogen bomb or is it just age and ultraviolet, like desert glass?" "No, somebody's grandfather liked it that color," Gusterson informed him with happy bitterness. "I like it too the glass, I mean, not the tint.
By removing this cover on the disk, the different colored rays shoot up. That was to attract attention. I used only white light through the periscope." "And it was this invisible light that blinded so many men, which in your hands blinded the crews of the Japanese?" asked the admiral. "Yes, sir. The ultraviolet rays are beneficial as a germicide, but are deadly if too strong."
He found that the waves were absorbed during the daytime much more than at night and he eventually reached the conclusion that the ultraviolet light from the sun ionized the gaseous molecules of the air, and ionized air absorbs the energy of the electric waves, so that the fact was established that clear sunlight and blue skies, though transparent to light, serve as a fog to the powerful Hertzian waves of wireless telegraphy.
The archive already includes fiber-optic readings of hidden letters and ultraviolet readings of erased text in the early 11th-century manuscript; full electronic facsimiles of the 18th-century transcripts of the manuscript; and selections from important 19th-century collations, editions, and translations.
At the foot of the ramp was a vast, low cavern, stretching out of sight in all directions. It was dim, shading into the darkness of distance. Its floor was water, flat water, subdivided into large rectangular vats. In most of the vats vegetation grew in various stages, greening under the ultraviolet rays that radiated from the low roof.
"My life work is about done. But other and younger men will take it up. We have made great strides in optics. The moving picture is a fact. Colored photographs are possible. The ultraviolet microscope shows us objects hitherto invisible because smaller than the wave length of visible light. We shall ultimately use this light to see through opaque objects.
I was only repeating what was suggested once by Professor Wood of Johns Hopkins. Practically all sources of light, you understand, give out more or less ultraviolet light, which plays no part in vision whatever. The human eye is sensitive to but few of the light rays that reach it, and if our eyes were constituted just the least bit differently we should have an entirely different set of images.
"I have here the will the second one," he snapped out, turning and facing the others in the room. Craig turned a switch in an apparatus which his students had brought from New York. From a tube on the table came a peculiar bluish light. "This," he explained, "is a source of ultraviolet rays. They are not the bluish light which you see, but rays contained in it which you can not see.
"But by the use of various devices we can, as it were, translate these ultraviolet rays into terms of what the human eye can see. In order to do it, all the visible light rays which show us the thing as we see it the tree green, the sky blue must be cut off.
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