Word: vapor
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Dates: during 1920-1929
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...type of quartz mercury vapor bulb for generating ultraviolet light developed...
...pitted the metal targets of X-ray tubes became after long electronic bambardment,* and inferred that flicking light also left its invisible mark. To bring such marks, if existent into sight meant long trials of various reagents on such battered metals. In the end he found that mercury vapor "developed" electronic engravings on gold, iodine on silver, hydrochloric acid on zinc, iodine on copper...
...practical operation Professor Goddard suggested last week a mirror 20 feet in diameter focusing on a boiler with a fused quartz base. The boiler would contain, instead of pulverized carbon, mercury sprayed continuously at the focus point of the reflected light. The mercury spray would turn instantly to mercury vapor and in turn vaporize the water which would operate a steam turbine. The turbine would operate an electric generator. Efficiency of such a sun engine would be 50% of the sun energy fused.* Professor Goddard calculates that such an engine would produce 30 h.p. while operated under a clear...
...California, Chile, South Africa. But although the earth is now getting more sun heat than normal, that is probably not the whole cause of the 1929 drought. More direct causes were, as students of government weather reports know,* light snows last winter, early thaws last spring, winds carrying water vapor away from the coasts instead of inland...
Colored television has become possible because Dr. Ives's colleagues at Bell Telephone laboratories invented a photo-electric cell more sensitive to light than the usual cell. The usual cell depends on the ionic action of potassium and hydrogen. The new cell uses sodium with sulphur vapor and oxygen...