Many a disaster has proved that the only safe gas to use in dirigibles is helium, and the world's helium comes from the U. S. Under an agreement with the U. S. made last year Germany was assured a supply of helium sufficient to operate its North Atlantic airship route, planned to commence service with the new LZ-130 in June. Then Hitler absorbed Austria and out of the welter of triumphant speeches the U. S. gathered that its helium might be used for war, held up the shipment. Last week Germany inquired through U....
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