Word: hydrogen
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Dates: during 1920-1929
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These examples may give some idea of the range of Professor Bridgman's work, which begins at 3000 atmospheres and goes up to 14,000--the highest ever reached by experiment. At this pressure mercury and hydrogen pass through thick nickel steel as though it were a sieve; and there are six different kinds of ice instead of the one that used to be found in cocktails. At these pressures it was found that white phosphorus when heated to 390 degrees suddenly changed from a colorless, waxy, translucent material to a much denser, jet-black, flaky substance like the graphite...
...Vitamine D, which he prefers to call by the name of "bios" first used by Professor Wildiers, of the University of Louvain, Belgium, in 1900. It was extracted from a solution of autolyzed (self-digested) yeast. It is an organic chemical structure composed of 43% carbon, 25% nitrogen, 8% hydrogen and 24% not yet completely analyzed...
...danger of fire totally eliminated with the use of helium; the gas-tanks and the fuel system generally are still vulnerable. But when a ship is properly designed and carefully handled, the danger of fire is comparatively small, even with hydrogen...
Another strong argument of hydrogen partisans is the fact that owing to the minute quantities of helium found in the natural gas at its source, an extremely expensive system of fractional distillation is necessary and the cost will always remain excessive...
General View. For a number of years the Navy has held that our helium monopoly meant supremacy in the air as far as dirigibles were concerned. But recently the attitude of the Bureau of Aeronautics has changed and its officers in various public utterances have advocated a return to hydrogen...