Word: meters
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Dates: during 1920-1929
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...Meter for measuring the intensity of the ultraviolet ray perfected...
Never before did a foreign yacht win all its races in U. S. waters. U. S. yachtsmen consoled themselves with the fact that the 30-square meter specifications required in this regatta, long common in Germany and Sweden, have rarely been met by U. S. designers before this year...
There is now a meter for measuring the intensity of ultraviolet rays. Its inventor, Dr. Harvey Clayton Rentschler (Ph. D.) director of lamp research for the Westinghouse Lamp Co., exhibited it last week at the annual meeting of the New York Electrical Society, as his inaugural demonstration upon assuming the Society's presidency...
...electrically. Hence when the Rentschler uranium bulb is exposed to an ultraviolet ray source an electric charge is created in proportion to the ray's intensity. This charge is accumulated in a condenser until a given potential is set up. Then the condenser discharges and, in the Rentschler meter, makes an argon tube give out a bluish flash and simultaneously causes a pencil to mark the occurrence on a chart. The time between the flashes and the tracings on the chart measures the strength of the ultraviolet rays...
Thus physicians may now administer ultraviolet rays in units the way they give other medicines by pellet, teaspoon, dropper. It remains for physicians to evolve a dosage scale in terms measurable by the Rentschler meter...