Word: tested
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Dates: during 1940-1949
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First comes the film. This over, there is a test consisting of ten questions on what was in the movie...
...Alabama Power Co., cooperating with the U.S. Bureau of Mines in the $500,000 test, was donating 500,000 tons of coal, willing to see it all go up in smoke and flame. The initial rate of burn-up was only 50 tons a day. The test would probably go on for a year...
Last week, the first big U.S. experiment with the process got under way at the Alabama Power Co.'s Gorgas mine, 55 miles northwest of Birmingham. (A small-scale test at the same site two years ago gave promising but inconclusive results.) A thermite bomb was exploded 160 ft. below the surface, at the bottom of a borehole at the south end of the seam. Running northward through the coal for 1,200 ft. were two parallel entries (tapped by additional boreholes every 300 ft.) through which air could be driven under pressure...
...beginning of the test, the gaseous outpourings of Alabama's man-made inferno were drawn off at Borehole No. 2, limiting the combustion to the first 300-ft. stretch. The underground temperature went up to 900° F. Later it might go as high as 3,000° F. No immediate attempt was made to produce a useful, combustible gas: the first thing was to see how steadily the coal could be made to burn. Later, hot air, steam or oxygen could be fed into Borehole No. 1 to make a variety of gases with different chemical and thermal...
...January, he drained 99.999999 percent of the air out of the cyclotron in a vacuum test. The main chamber has to be free of air molecules when in operation, so that the spinning electrons won't bump into anything...