Word: volters
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Dates: during 1940-1949
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...volt machines began appearing in a few great U.S. hospitals on a new, more compact model, weighing about 4,000 pounds, one-quarter of this weight being lead to keep the rays from getting out into the hospitals. Costing some $40,000 apiece, every 1,000,000-volter is the equivalent of $90,000,000 worth of radium.* (Radium is still widely used in therapy because of its compactness: it can even be planted inside a patient and left there for a while to do its work...