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But this small gravitative power of the moon would prevent its retaining on its surface any of the gases forming our atmosphere, which would all escape from it and probably be recaptured by the earth.
Once get to the bottom safe, and we can laugh at Posse, and hue and cry, and at the King's Crown itself. They cannot search all the quarries, and are not like to search any of them, for they are cowards at the best, and hang much on tales of the Mandrive. Ay, and such tales are true enough, for there lurk gases at the bottom of most of the shafts, like devils to strangle any that go down.
An elastic fluid of an unknown nature is being constantly formed on the dark surface of the sun, and rising up on account of its specific lightness, it forms the pores in the stratum of reflecting clouds; then, combining with other gases, it produces the wrinkles in the region of luminous clouds.
Modern philosophers think that by their doctrine of gases they can explain all the appearances of the Pythia; but the ancients, to whom this doctrine was unknown, admitted these appearances as the undoubted evidence of an interposition from heaven.
When the pumps in the air lock began pulling out the methane-laden atmosphere, they began to bulge slightly, but not excessively. Then nitrogen, extracted from the ammonia snow that was so plentiful, filled the room, diluting the remaining inflammable gases to a harmless concentration.
I spurred my imagination, searching for agencies of destruction, and mentioned hidden mines, powerful electric currents, deadly gases, but Astor shook his head. "It's worse than that, much worse. And it isn't one of those fantastic things from Mars that H. G. Wells would put in a novel. This will work. It's a practical, businesslike way of destroying an army." "What? An entire army?" "Yes.
The six gases which still proved intractable, and which hence came to be spoken of as "permanent gases," were nitrous oxide, marsh gas, carbonic oxide, oxygen, nitrogen, and hydrogen. These six refractory gases now became a target for the experiments of a host of workers in all parts of the world.
The foliage is sensitive to atmospheric conditions, and cannot be successfully grown where it is subject to poisonous gases. Smoke from a pottery carried over the bed by prevailing winds is almost sure to be fatal. Salt is thrown into the kilns to glaze the ware, and the chlorine set free is deadly to many plants.
In practice, however, the inefficient scavenging of virtually every two-stroke cycle engine produced nullifies or more than nullifies its advantages over the four-stroke cycle engine; in many types, too, there is a waste of fuel gases through the exhaust ports, and much has yet to be done in the way of experiment and resulting design before the two-stroke cycle engine can be regarded as equally reliable, economical, and powerful with its elder brother.
But, as in the case of the manufactures, the Nemesis comes, swift and sure. As the foul vapours of the mine and the manufactory destroy vegetation and injure health, so does the Nemesis fall on the world of man; so does that human soot, these human poison gases, infect the whole society which has allowed them to fester under its feet. Sad, but not hopeless!
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