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Updated: May 18, 2025
These bubbles are a form of gas called carbon-dioxide, or carbonic-acid, gas. If, after they appear, the juice is tasted, it will be found to be slightly alcoholic and to have a somewhat sour or acid taste. The gas, the acid, and the alcohol thus produced are the three results of the action of the ferment.
This heavy proportion of carbon-dioxide would cause the atmosphere to act as a glass-house over the surface of the earth, as it does still to some extent. Experiment has shown that an atmosphere containing much vapour and carbon-dioxide lets the heat-rays pass through when they are accompanied by strong light, but checks them when they are separated from the light.
We can pick it up on the way back. We shouldn't need it with lungs, anyway. Do you boys have rescue packs?" The packs were plastic floats compressed into packages no larger than a cigarette pack. They contained a carbon-dioxide cartridge and could be inflated simply by squeezing them, which punctured the cartridge.
Carbon-dioxide snow may be employed in the same manner, but the results are inferior to those obtained by radium. Igni-puncture consists in making a number of punctures at different parts of the nævus with a fine-pointed thermo-cautery, with the object of starting at each point a process of cicatrisation which extends throughout the nævoid tissue and so obliterates the vessels.
It at once occurs to us that these facts seem to confirm the prevalent idea, that the Coal-forests stripped the air of its carbon-dioxide until the earth shivered in an atmosphere thinner than that of to-day.
The reduction of the carbon-dioxide would be even more gradual. It is impossible to say how long it would take these processes to reach a very effective stage, but it is equally impossible to show that the interval between the upheaval and the glaciation is greater than the theory demands.
This point he dwells upon repeatedly, stating, of these blue borders: "This excludes the possibility of their being formed by carbon-dioxide, and shows that of all the substances we know the material composing them must be water." This is the only proof of the existence of water he adduces, and it is certainly a most extraordinary and futile one.
He adduces evidence of an atmosphere, but of an exceedingly scanty one, since the greatest amount he can give to it is "not more than about four inches of barometric pressure as we reckon it"; and he assumes, as he has a fair right to do till disproved, that it consists of oxygen and nitrogen, with carbon-dioxide and water-vapour, in approximately the same proportions as with us.
He further supposes that water and carbon-dioxide issue from the interior into these fissures, and, in conjunction with sunlight, promote the growth of vegetation.
But this argument, as I have already shown, is valueless. For only very deep water can possibly show a blue colour by reflected light, while a dust-laden atmosphere especially with a layer of very dense gas at the bottom of it, as would be the case with the newly evaporated carbon-dioxide from the diminishing snow-cap would provide the very conditions likely to produce this blue tinge of colour.
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