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Every little while a wave would beat against the cheek as though a furnace door had been opened. Nevertheless Kingozi knew that this was also the hour when the sun's power begins to decline; when the vertical rays begin to give place. For it is not heat that kills, but the actinic power of rays unfiltered by a long slant through the earth's atmosphere.
By the power of these rays including the calorific, the luminous, and the actinic the natural affinities by which the above-mentioned substances were united are overcome, and they are formed into new combinations, in which they are united by very weak affinities. Of course, they have a strong tendency to break away from the new unions, and fall back into the old.
The red rays are thus said to be at the lower edge of the prism, and the violet rays at the upper edge. Below the red rays there are now known to be certain invisible rays, as of heat and electricity. Above the violet rays are other invisible rays, such as the actinic influence. In fact, the spectrum, beginning invisibly, passes by way of the visible rays to the invisible again.
Snap was shouting, "Give him another!" But the figure passed beyond the actinic glare and vanished. We were detained in the turmoil of the corridor for ten minutes or more with official explanations. Then a message from Halsey released us. The Martian who had been following us in his invisible cloak was never caught.
Perhaps some trick of constitution or some singularity of the nervous system renders them immune to the poison, as the orange pigment said to reside in their epidermis protects them from the actinic rays of the sun. Does not Darwin assert that while white sheep and pigs are upset by certain plants dark-coloured individuals escape.
Passing up the harbour, in appearance like a fine river, the clearness of the water afforded me one of the most astonishing and beautiful sights I have ever beheld. The bottom was absolutely hidden by a continuous series of corals, sponges, actinic, and other marine productions of magnificent dimensions, varied forms, and brilliant colours.
The signal has been sounded too grave for the ear of the sailor at the masthead and his comrades on the deck who nevertheless feel its vibrations in the ship as the stones of a cathedral are stirred by the bass of the organ. "As with sounds, so with colors. At each end of the solar spectrum the chemist can detect the presence of what are known as 'actinic' rays.
That forms seeming to defy all laws of equilibrium were, nevertheless, not wholly evanescent, appeared from their identity at an interval of seven minutes, during which the lunar shadow was in transit from one station to the other; and the singular energy of their actinic rays was shown by the record on the sensitive plates of some prominences invisible in the telescope.
A great deal has to be done by the chemist before the astronomer can be on sure ground in drawing conclusions from certain portions of his spectroscopic evidence. The light of the nebulas is remarkably actinic, so that photography has a specially fine field in revealing details imperceptible in the telescope.
I stared, but I had to shield my eyes against the dazzling actinic glare, and I could see nothing. Was Miko making a zed-ray photograph of our interiors? We had no way of knowing. He was testing his short range projectors now. With my eyes again accustomed to the normal Earthlight in the valley, I could see the stabs of electronic beams, the Martian paralyzing rays and heat beams.
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