Neglected Edwardian inventor 'made 1920s death ray'

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The achievements of eccentric inventor Harry Grindell Matthews' who came up with a prototype mobile telephone and a 'death ray' are being revived by a science teacher.

Author Jonathan Foster said Matthews' contribution to science had been largely overlooked despite his many inventions.

Lauded as 'Death Ray Matthews' in the press in the 1920s, he claimed his contraption could stop a motorbike engine, explode gunpowder or kill a mouse.

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