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At the same moment the slight smell peculiar to carburetted hydrogen was perceptibly diffused through the atmosphere. And, in truth, the fall of the rock had made a passage of escape for an enormous quantity of explosive gas, accumulated in vast cavities, the openings to which had hitherto been blocked up.
The goddess is the form of Durga, worshipped wherever a subterraneous flame breaks forth, or wherever jets of carburetted hydrogen gas are emitted from the soil. Bana's banner has fallen. His minister and wife endeavour to prevail on him to propitiate Siva, in order to avert the evil omen, but he refuses. Bringi, a servant of Durga, precedes Aniruddha to prepare the goddess to grant his request.
It appears that in the course of the preceding year his attention had been called to the subject by an iron-maker, who asked him if he thought it possible to purify the air blown into the blast furnaces, in like manner as carburetted hydrogen gas was purified.
These insensible passages from primitive to transition strata by clay-slate, which becomes carburetted at the same time that it presents a concordant position with mica-slate and gneiss, have also been observed several times in Europe by celebrated geologists.
In this type the inlet and exhaust valves are both located in the cylinder head, and mechanically operated by push-rods and rockers. Pipes are carried from the crank case to the inlet valve casings to convey the mixture to the cylinders, a carburettor of the central needle type being used. The carburetted mixture is taken into the crank case chamber in a manner similar to that of the Gnome engine.
Yet chemistry has shown, that, except in special localities, carburetted hydrogen occurs only as a slight trace, the existence of which in most cases is rather inferred than actually demonstrated, and that it has no important office to perform, while nitric acid shares with ammonia in the grand function of the nourishment of plants.
Davy was now emboldened to introduce into his green bag, four quarts of carburetted hydrogen gas, nearly pure. After exhausting his lungs in the usual way, he made two inspirations of this gas. The first inspiration produced numbness and loss of feeling in the chest.
We made the mixtures in all proportions of light carburetted hydrogen with atmospheric air in the receiver, and we found by the experiments that when a current of the most explosive mixture that we could make was forced up a tube 4/10 of an inch in diameter, the necessary current was 9 inches in a second to prevent its coming down that tube. These experiments were repeated several times.
The great humidity and thickness of the forest forced us to retrace our steps and to gain the shore before sunset. In several places the compact limestone rock, probably of tertiary formation, is visible. A thick layer of clay and mould rendered observation difficult; but a shelf of carburetted and shining slate seemed to me to indicate the presence of more ancient formations.
The inlet valves both on the charging and the power cylinders are automatic; when the power piston is near the bottom of its stroke the piston in the charging cylinder is compressing the carburetted air, so that as soon as the pressure within the power cylinder is relieved by the exit of the burnt gases through the exhaust ports the pressure in the charging cylinder causes the valve in the head of the power cylinder to open, and fresh mixture flows into the cylinder, replacing the exhaust gases.
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