Word: nitrogen
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Dates: during 1920-1929
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...tivo blades to it. The tractor that drags it is equipped with a generator from which the current passes from share to share under the soil, which must be damp to insure good transmision. The current thus electrocutes all insect life in its path and also it fixes nitrogen from the atmosphere into the soil thus fertilizing the field...
...Reduction-powerful pumps compress oxygen, hydrogen or acetylene into tall, slim, thick-walled steel tanks for welding or burning through metal; incandescent bulb makers buy nitrogen and argon-profits...
...could get a rest, it might heal up. The operation of artificial pneumothorax does give one lung such a rest, leaving the other to breathe for both. The surgeon sticks a hollow needle into the pleural cavity of the tubercular lung and lets some air, oxygen or nitrogen flow in. The lung collapses. He increases the pressure of the gas against the flaccid lung. This squeezes tubercular secretions out into the windpipe, like toothpaste out of a tube; and the patient expectorates. The pressure also brings healing blood to the lung, and after a time the sputum ceases to carry...
Fertilizers. "When we want, we shall make food from coal or wood," confidently said Dr. Louis C. Jones of the Nitrogen Engineering Corp., Manhattan. Four-fifths of the world's production of artificial fertilizers are made with the aid of coal, not by water power as is commonly supposed...
...aluminum disc of earlier experiments. It was a sheet of nickel 1/2000 of an inch thin and three inches in diameter, supported against the 100-pound suction of the vacuum tube by skeleton struts of molybdenum. The molecular structure of nickel is such that molecules of air (oxygen, nitrogen) cannot pass through it, though it offers a minimum of resistance to those billionth parts of molecules, electrons...