Word: hydrogen
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Dates: during 1920-1929
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...equilibrium. Besi'des being a source of expense, this meant that there was less reserve of gas left for emergencies. A new process is now available on board the Shenandoah whereby the weight of the fuel burnt by the engines is automatically compensated for. When gasoline burns, the hydrogen it contains combines with the oxygen of the air to form water, or rather steam. In the new process the exhaust gases are cooled by huge water radiators, the steam condenses and is carefully collected as water ballast. The Secretary tasted some of this and pronounced it "excellent...
...President Coolidge by proclamation gave notice that in accordance with the flexible provision of the Tariff Act, in 30 days the import duty on barium dioxide (used in the manufacture of hydrogen peroxide) would be raised from 4? to 6? a pound. The Tariff Commission had reported that Germany was the principal competing country and manufactured barium dioxide more than 6? a pound cheaper than it can be done...
...scientists agree upon an atom which has a very minute, positively charged nucleus, neutralized by a number of negative electrons which surround it. The nucleus has always a definite number of positive charges upon it, varying from one (hydrogen) to 92 (uranium). Outside the nucleus are the negative electrons, varying in number in the same way. The outermost layer of these are the valence electrons, which mingle with those of other atoms in the process of combination. So far as physical science has gone, there have appeared but two fundamental entities, positive and negative electrons?the building stones...
...Richard B. Moore again championed helium as an aeronautic gas. The Dixmude, ZR-2, and Roma disasters would not have occurred, if it had been used, he said. Within a year or two, the cost of production will be practically as cheap as for hydrogen...
...wind is the sole driving, force, but its direction and intensity vary from height to height. The: thing is to keep the craft at that altitude where the wind effects are most: favorable. Suppose a balloon im equilibrium at a certain height. The: sun may come out, heat the hydrogen, contained within the gas, cause it to rise too high. The unskilled pilot: may let out gas in too much of a hurry, drop rapidly, throw out too- much ballast to check his descent, shoot up and lose more gas. "Bobbing up and down," he soon exhausts both...