After many years of experiment a Danish engineer, M. Arnold Christensen, has devised a machine which, experts think, will be the most effective defence against aerial raids that has ever been invented. It takes the form of a gun which shoots into the air large masses of gas that render the occupants of any attacking aeroplane or airship unconscious. Tests are shortly to be made by a special gas committee of the Danish General Staff, and if, ns is expected, they prove satisfactory, the British Government may consider the quo.stion of acquiring participating rights in tlio invention.
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Otago Daily Times, Issue 20385, 17 April 1928, Page 16
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97Untitled Otago Daily Times, Issue 20385, 17 April 1928, Page 16
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