Word: tungsten
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Dates: during 1920-1929
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That the U. S. is "self-sustaining" in most respects but depends almost entirely upon other countries for chromium, manganese, tungsten, nickel, tin, mercury, hemp, rubber, nitrates, coffee, potash...
...federation of six States composing the Commonwealth of Australia, created Jan. 1, 1901. It occupies the north-east quarter of the continent. Captain Cook discovered it in 1770. Forests cover half its surface. Its chief source of wealth is in minerals; gold, silver, copper, tin, lead, tungsten, and coal are mined...
...electro-physicists this title was a great deal more significant than it would have sounded to laymen. It meant that Dr. Coolidge-the man who, besides his X-ray work, first learned to make brittle tungsten ductile and so suitable for electric light bulbs ("Mazda") of low price and long life-that this man of results had been exploring a field discovered 50 years ago by Sir William Crookes of England and only faintly understood ever since...
Hottest Flame. Dr. Irving Langmuir of the General Electric Company described his discovery of a flame hotter than hydrogen burning in oxygen (oxy-hydrogen). He made atomic hydrogen burn in an atmosphere of molecular hydrogen. His hydrogen blowtorch melted tungsten wire like an icicle, indicating that its heat was at least 7,000° F. Playing on a sheet of chrome steel the flame left molten pools behind it. Significance: steel girders could be welded silently instead of noisily riveted;* the welds would not (as when an oxyhydrogen flame is used) be oxidized and thus weakened, they would be annealing...
Last week, Professor Karl T. Compton reported that he had put molecular hydrogen into a tungsten tube, heated it to 2,800 degrees Centigrade, thereby dissociating it into atomic hydrogen, and shot into this a current of electrons from a hot filament similar to those used in a radio tube. The energy of this current was readily reckoned in volts, and as the voltage was increased things began to happen to the hydrogen atoms it encountered. Suddenly they began to emit radiation of a definite wavelength, measurable as a single line in a light spectrum. The hydrogen atoms had been...