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Your search for 'machinery' returned 4 records.

Monoplane model with flapping wings

Monoplane model with flapping wings – 1889

Powered by a single cylinder, compressed air engine

Destroy prickly pear with a flame thrower

Destroy prickly pear with a flame thrower – 13 March 1919

Letter to the Advisory Council of Science and Industry

Thanks for your suggestions

Thanks for your suggestions – 03 June 1919

Reply to RS Papprill

War tanks with circular saws, rollers and poison spray

War tanks with circular saws, rollers and poison spray – 28 January 1921

Letter to the Bureau of Science and Industry