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From orifices on the tops of these mounds there are thrown out sometimes jets of warmish water and mud mixed with bitumen, sometimes bubbles of gas, chiefly carbonic acid and carburetted hydrogen, occasionally pure nitrogen. The mud ejected has often a strong sulphurous smell.
They're not dangerous, as long as there is no carbonic acid gas given off, and I don't smell any of that, yet. Say, Ned, it's erupting all right, isn't it?" "I should say so!" cried his chum. "Put us a little to one side, Mr. Damon," called Tom to his friend, who was in the pilot house. "I can't get good pictures through so much smoke. It's clearer off to the left."
"Well, such is not the case; there are other elements in the air besides these." "If you mean that the air accidentally, or even permanently, holds in solution a certain quantity of water, or a portion of carbonic acid gas, and possibly some particles of dust arising from terrestrial bodies, then I grant your premises."
As soon as the gaseous mixture in the flask consisted entirely of carbonic acid and nitrogen, the vitality of the yeast was dependent on, and in proportion to, the quantity of air which entered the flask in consequence of variations of temperature. The question now arose, was this yeast, which had developed wholly as an ordinary fungus, still capable of manifesting the character of a ferment?
Experiment has, in fact, demonstrated that carbonic acid increases in the air of inhabited rooms in the same way as do those organic matters which are difficult of direct estimation.
The soil of the continents was covered with immense forests. Carbonic acid, so suitable for the development of the vegetable kingdom, abounded. The feet of these trees were drowned in a sort of immense lagoon, kept continually full by currents of fresh and salt waters.
Whatever iron they contain is dissolved from the land and transported in a condition of protoxide and some proto salt, such as the carbonate, and the process is facilitated by the presence of carbonic acid in the water. Now iron occurs in these older rocks as protoxide and peroxide, the former of which is soluble and the latter insoluble in water.
Why does Hodge, who is so strong on grain and guano, know absolutely nothing about carbonic acid? That seems at first sight a difficult question to meet. But I think we can meet it with a simple analogy. Oxygen is an absolute necessary of human life. Even food itself is hardly so important an element in our daily existence; for Succi, Dr.
Its composition is carbonic acid, 0.35; carbonic oxide, 0.26; illuminating hydrocarbons, 0.56; hydrogen, 4.79; marsh gas, C H , 89.65; ethyl hydride, C H , 4.39; specific gravity, 0.558. This analysis shows about 57 per cent. of carbon and 42 per cent. of hydrogen. If the well discharges one million cubic feet of gas daily, it would weigh about sixty tons, yielding thirty-nine tons of carbon. Mr.
It was evident that the corners of the original fragments of chalk had been wholly dissolved, from presenting a large surface to the carbonic acid dissolved in the rain-water and to that generated in soil containing vegetable matter, as well as to the humus-acids.
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