Abstract
THE developments of the last twenty years in helium production in the United States are described in Engineering of January 26. Reference is made to a lecture delivered recently in the College of Engineering of the University of Maryland by Dr. C. W. Siebel, supervising engineer of the Government-owned helium plant near Amarillo, Texas, and to a memorandum issued by the United States Bureau of Mines. The present helium-producing plant at Amarillo has a capacity of 24 million cubic feet of helium of 98·2 per cent purity a year, but it is stated in the Bureau of Mines memorandum that, by installing another production unit in existing buildings, the output could be raised to 36 million cubic feet a year. As the present military and commercial requirements, aggregating approximately 6 million cubic ft. a year, are met by operating the plant at about one quarter of the installed capacity, there is a large reserve for emergencies.
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