Word: coelostat
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...trying to say something important....When we'd stepped off the plane at Nouakchott, several people thought they were feeling exhaust from the airplane engines. But it was just an average Mauritanian afternoon, 114 and breezy....Much of the equipment Kern had brought to Africa was homemade, including a coelostat that incorporated a bicycle chain, part of a gun mount, and lead from melted car batteries.... Total eclipses are the ideal time for Vulcan hunts, since the sun is high but the sky is dark. Fischer was going to use an enormous aerial camera from World War II to photograph...
...Chemist W. M. Cohn of Berkeley, Calif, described the solar furnace invented in Germany which he uses for high-temperature work. It consists of a coelostat (flat mirror geared to follow the sun) which feeds the rays into a concave reflector whence they are sharply focused on the substance under treatment. Dr. Cohn uses the sun furnace to make a clear, yellowish, glassy lining for kilns out of zirconium oxide. A half-minute under the reflector melts the oxide at 4,850° F. Higher temperatures than this have been obtained in electric furnaces, but Dr. Cohn believes that...
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