The machine blends iron, bleach and sodium hydroxide to form a dark purple liquid mixture of ferrate, salt and water that gets metered into the water supply. (The color disappears instantly as it reacts with the water.) Common disinfectants ozone and chlorine can turn the water cloudy or, worse, leave behind harmful chemical by-products.

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The game also features Mark 42 armor for Iron Man and Iron Patriot armor for War Machine.

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The Iron Duke was the first machine in the UK used to roll sheet rubber and cotton together and vulcanise them to make waterproof fabric.

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In its hey day the machine, called the Iron Duke, after the Duke of Wellington, was at the centre of the town's economy.

BBC: Iron Duke set for return to Bradford on Avon

Since metal detectors are designed to distinguish gold from iron junk, he dug whenever the machine told him he was passing over rubbish.

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In early February a classic snow-machine race, the 2, 000-mile Iron Dog, was cancelled for the first time in its 20-year history.

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Our tradition ranges from Hiram S. Maxim, inventor of the first fully automatic machine gun, who was born in 1840 in Sangerville, Maine, to the renowned Bath Iron Works, which produces the world's most advanced surface warships.

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