Early versions of this technique were used to join pieces of aluminium jewellery and to weld parts of aeroplanes from the US in the Second World War. (newscientist.com)
The Wright 30 - horse - power aeroplane in flight above the North Carolina coast, in a drawing prepared from descriptions by observers of the experiments. (scientificamerican.com)
That series on Rolls - Royce and Bentley motor cars was inspired by his similar work on aeroplanes going back forty years. (rrab.com)