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CHAPTER I. SATURN. Landing on a place about ten degrees north of the equator, so that they might obtain a good view of the great rings--since ON the line only the thin edge would be visible--they opened a port-hole with the same caution they had exercised on Jupiter. Again there was a rush of air, showing that the pressure without was greater than that within; but on this occasion the barometer stopped at thirty-eight, from which they calculated that the pressure was nineteen pounds to the square inch on their bodies, instead of fifteen as at sea-level on earth. This difference was so slight that they scarcely felt it. They also discarded the apergetic outfits that had been so useful on Jupiter, as unnecessary here. The air was an icy blast, and though they quickly closed the opening, the interior of the Callisto was considerably chilled. "We shall want our winter clothes," said Bearwarden; "it might be more comfortable for us exactly on the equator, though the scene at night will be far finer here, if we can stand the climate. Doubtless it will also be warmer soon, for the sun has but just risen." "I suspect this is merely one of the cold waves that rush towards the equator at this season, which corresponds to about the 10th of our September," replied Cortlandt. "The poles of Saturn must be intensely cold during its long winter of fourteen and three quarter years, for, the axis being inclined twenty-seven degrees from the perpendicular of its orbit, the pole turned from the sun is more shut off from its heat than ours, and in addition to this the mean distance--more than eight hundred and eighty million miles--is very great. Since the chemical composition of the air we have inhaled has not troubled our lungs, it is fair to suppose we shall have no difficulty in breathing." Having dressed themselves more warmly, and seen by a thermometer they had placed outside that the temperature was thirty-eight degrees Fahrenheit, which had seemed very cold compared with the warmth inside the Callisto, they again opened the port-hole, this time leaving it open longer. What they had felt before was evidently merely a sudden gust, for the air was now comparatively calm. Finding that the doctor's prediction as to the suitability of the air to their lungs was correct, they ventured out, closing the door as they went. Expecting, as on Jupiter, to find principally vertebrates of the rep
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