The Earth was now about three times the diameter of a rising Full Moon, and the corona was about a quarter her width, and looked as if twenty shell-pink suns were set one against the other and overlapping all about the edge of the dark orb.
“How do you know that is not really the extending edge of the Sun?” I asked the doctor. “Perhaps we are already far enough away to see it all about the Earth like that.”
“If that were really the Sun, the light from his extending edge would illuminate the surface of the Earth towards us. The planet’s outline would be irregular and partly glowing, but you see it is quite dull and dark, and the outline is most plainly visible.”
In rapt attention I watched the delicate shell-pink change to a deeper hue of orange, and then our twilight waned a little and turned a sombre grey. Presently the corona glowed a rich maroon, gradually dying to a luminous purple, which slowly deepened and darkened, and finally melted into the general blackness. And lo! we were in the shadow again, and the dreamily beautiful panorama was over.
“It must have lasted nearly an hour,” said the doctor. “I am sorry we did not notice the beginning, but it must have commenced with the same dull shades we saw at the end, and gradually changed to brighter colours. I secured three negatives when the glow was most intense.”
“Then we have had a waxing and a waning twilight coming together in the middle of our night. And the corona was like a sunrise, followed immediately by a sunset,” I exclaimed.
“And why shouldn’t it appear so?” said the matter-of-fact doctor. “Twilight is the commonest phenomenon of refraction with which we are acquainted, and sunrise and sunset are merely a mixture of refraction and reflection. There is nothing new about it.”
“Now, Doctor, we must remain friends, but you shall not continually tarnish my poetry with your accursed science! I thank my Creator that He made me ignorant enough to admire the beauties of nature. You are continually peeping behind the scenes, and pointing out the grease paints, the lime-lights and the sham effects. Let me enjoy the beauty of the tableau, no matter how it is produced. I would give all of your pat knowledge for that feeling of profound awe which rises in the untutored breast at beholding the magnificent grandeur of unfamiliar nature.”
“When your ecstasy has quite passed, I shall appreciate a little cold mutton and biscuits, and then we must pump out again,” he replied.
CHAPTER XI
Telling the Time by Geography
After supper I went up into his compartment, and having arranged the bulkhead, began the tedious operation at the pump handle. It was a matter of pure muscular strength, as the effort had to be made to lift the handle, which snapped back sharply when released. I was working vigorously when I was suddenly struck dumb at seeing the handle break off just at the point of leverage, so that it was quite impossible to operate it. The doctor heard the handle fall, and looked around in great vexation.
“That means asphyxiation within twenty-four hours!” he exclaimed.
“Which is plenty of time to think it over,” I answered.
After all, why was this pumping necessary? If a way could be devised to open a valve, all the air would rush out of my compartment as easily as beer runs out of a bung-hole. In fact, it did rush out a little at a time, which is what made the handle go down of itself. But any such new valve would have to be automatically closed, as it would be manifestly impossible to enter and shut it. I kept on thinking, and finally began examining the partition between the compartments. There seemed to be several long screws that went quite through it.
“Doctor, did you ever hear of those wise people who, after every freshet, shipped the surplus water down the river in boats? Well, it strikes me this air-pumping is just about as useless labour. Help me pull in the bulkhead and I will show you something.”
I went at once to the cylinder we used for discharging things from the projectile. With a pair of pliers I chipped off a small piece of the edge of the closing lid in two places, one near each end. This made two little irregular holes into the cylinder about eight inches apart. Then I pushed it half way out, so that one hole was outside and the other inside. Of course the air rushed through the inner hole into the cylinder, and thence through the outer hole to the exterior.
“Shut that thing!” cried the doctor, when he saw what I had done. “Do you wish to suffocate us? That will let the air out perfectly, but how are you going to close it to admit the condensed air?”
“People unskilled in these matters are so hasty!” I said rather sarcastically. “Wait until I have finished and you will see.”
I found he had a screw-driver, and I loosened one of the long screws and enlarged the half of its hole toward my compartment. Then I whittled a block of soft wood, so that it would slide smoothly into this half of the hole. Driving the screw home again, I just allowed its tip to enter the end of the block. Then I fastened a piece of stout twine to the cylinder and the other end to the block of wood, which was almost opposite it. Pushing the cylinder half way out, I made the twine taut, and hastening into the doctor’s compartment, I thrust in the bulkhead. The air was rapidly escaping. Waiting long enough for all of it to have leaked out, I then unscrewed the long screw, which gradually drew in the block of wood and the twine, and thus pulled the cylinder into the projectile so that there was no connection with the exterior. Then the doctor let in the condensed air to a barometric pressure of twenty-six, and the whole operation was over in a few minutes. My compartment must have been almost a complete vacuum. When it was over, I cried rather triumphantly to the doctor,—
“There, you see, one doesn’t need a steam pump to make the water run over Niagara! At this distance from the surface, nature abhors a gas and prefers a vacuum!” He was inclined to be rather sulky at first, but he really did not like pumping any better than I did.
I should say it was about five hours later that we noticed it was growing gradually lighter outside. Mars lost his ruddiness and grew pale in a grey field. Our view of the Earth was also becoming more and more misty.
“We are emerging from the black core of the shadow into the semi-illuminated penumbra,” said the doctor. Then he altered his course experimentally, and found a slightly darker path, but it soon began changing again to grey.
“There is no use trying to keep in the umbra any longer. It is growing too narrow. The penumbra will last quite a long time yet, but it will gradually get fainter and fainter. We shall not plunge at once into the dreadful light you fear so much. Keep your eyes glued to the Earth. I can scarcely see Mars any longer. The whole field is getting blank and white.”
The rear vista was also growing a pale white, and I could distinguish the form of the Earth as a darker object slightly larger than a full moon when risen. But it was all growing dimmer and dimmer as the penumbra faded toward the perfect light.
“Mars is completely gone now,” said the doctor. “The field of the telescope is one pale curtain of light. I have steered to the left to go ahead of him now, as there is no longer any reason for going behind him.”
I heard him working at the telescope as if loosening it from its fastenings, but I dared not take my eyes from the Earth to see what he was doing. Presently he called out to me,—
“Make room down there. I must bring the instrument down and observe the Earth now. Be careful you don’t lose sight of her.” But the instant he removed the telescope from its bearings and uncovered his forward window, I lost all view of the Earth. The new light now entering by his window, from behind me, made it impossible to see so far.
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