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The flame of the lamp, burning straight and clear, revealed no trace of the carburetted hydrogen. "Close to the wall," said the engineer. "Yes," responded Ford, carrying the lamp to that part of the wall at which he and his son had, the evening before, proved the escape of gas. The old miner's arm trembled whilst he tried to hoist the lamp up. "Take my place, Harry," said he.
In 1891 Mr Day invented a two-stroke cycle engine which used the crank case as a scavenging chamber, and a very large number of these engines have been built for industrial purposes. The charge of carburetted air is drawn through a non-return valve into the crank chamber during the upstroke of the piston, and compressed to about 4 lbs. pressure per square inch on the down stroke.
This annual crop of pork a jocund professor once described as "a prodigious mass of heavy carburetted hydrogen gas and scrofula;" but the chemists of our day would more properly stigmatize it as a vast quantity of Luzic, Myristic, Palmitic, Margaric, and Stearic acids in combination with glycerine and fibre.
But though this experiment might not be repeated, there was one other nearly as dangerous, to which Mr. Davy's love of science prompted him to resort; not by trying it on another but, generously, on himself. Mr. Davy wished to determine whether the carburetted hydrogen gas, was so destructive to animal life as had been represented.
It cannot, however, be stated to be any one gas in particular, since it is a mechanical mixture of at least three different gases, and often contains small quantities of others. A very large proportion consists of what is known as marsh-gas, or light carburetted hydrogen. It is disengaged wherever vegetable matter has fallen and has become decayed.
I wonder they do not get up a Carburetted Hydrogen Gas Company there, with a suitable engineer and railway, so that visitors might cross over to Goat Island on an atmospheric line.
A slow decomposition of the pyrites, which probably act as so many little galvanic piles, renders the waters alumiferous, that circulate across the bituminous lignites and carburetted clays. Analogous chemical actions may take place in primitive and transition slates as well as in tertiary formations.
=Coal Gas.= Coal gas contains light carburetted hydrogen or marsh gas, olefiant gas, ammonia, sulphuretted hydrogen, carbonic acid, carbonic oxide, free hydrogen, and nitrogen. Coal gas has an offensive odour, burns with a yellowish-white flame, yielding water and carbonic acid. Cases of poisoning often due to escape of gas into the room. Symptoms.
The light, you are doubtless aware, comes from the incandescence of the carbon, heated by the union of the hydrogen of the gas with a portion of the oxygen of the air." The chemist now read from his manuscript again: "Carburetted hydrogen of a passably good quality requires two volumes of pure oxygen for its complete combustion and conversion into carbonic acid and water.
He then produced several bladders full of carburetted hydrogen, which he had collected from the blowers in the Killingworth mine, and proved the safety of his lamp by numerous experiments with the gas, repeated in various ways; his earnest and impressive manner exciting in the minds of his auditors the liveliest interest both in the inventor and his invention.
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