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But for each one that was destroyed two came up from holes in the ground and the battle-line fell back toward Titania, back toward a long line of derrick-like structures which were sinking force-rods into the ground in furious haste. Stevens flashed on his ultra-violet projector and swung it into the thickest ranks of the enemy.
Course after course of the heaviest possible screen was sent out, driven by massed batteries of copper now disintegrating at the rate of tons in every second, only to flare through the ultra-violet and to go down before that dreadful, that irresistible onslaught.
When you really want to associate spiritually with us, you can do so; for, though perhaps only one in a hundred million can, like me, so clothe himself as to be again visible to mortal eyes, many of us could affect gelatine or extremely sensitive plates that would show interruptions in the ultra-violet chemical rays that, like the thermal red beyond the visible spectroscope, you know exist though you can neither see nor feel them.
These manifestations, however, are not the effect of radio-activity, but are probably the effects of short ultra-violet light waves, and are not produced spontaneously by the substances.
Doctor Jack Odin stretched out on a huge bed and felt the strength of the ultra-violet light upon the ceiling pour into his shoulders. In the next room, Gunnar was bathing and complaining about the sea water. Drinking-water in Opal was now at a premium. Odin had been in the dumps.
It should be said, however, that apart from its innate difficulties this theory has recently received its death-blow by the discovery of the fact that space is filled with ultra-violet rays, which would soon prove fatal to all forms of life. See, especially, Duncan, Some Chemical Problems of Today, pp. 63-83 and 97-104. "Rector" is the name of Mrs.
In observations made at the Riffel, and at 14,000 feet, I have found that it is possible to see far into the ultra-violet, and to distinguish and measure lines in the sun's spectrum which can ordinarily only be seen by the aid of a fluorescent eye piece or by means of photography.
Train your sights on the nose of that first ship when you're ready, call out." "Ready ready " Ten men replied. "Fire!" roared the technician. Ten titanic swords of pure ultra-violet energy, energy that practically no unconditioned metal will reflect to more than fifty per cent, emerged.
These infinitesimally small ultra-violet or actinic waves, as they are called, are the principal agents in photography, and the great waves of wireless telegraphy are able to carry a force across the Atlantic which can sensibly affect the apparatus on the other side; therefore we see that the ether of space affords a medium through which energy can be transmitted by means of vibrations.
The lighting of the room should be carefully attended to and capable of the slightest gradation. Means should be provided for obtaining moving pictures of the séance from without the room, unknown to the medium. Were the sittings held in complete darkness, these photographs could be obtained by means of ultra-violet light, with which the room might be flooded.
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