Carl Rogers Darnall (1867-1941), US Army surgeon and chemist. Darnall invented a mechanical 'chlorinator' to purify drinking water using liquid chlori

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Carl Rogers Darnall (1867-1941), US Army surgeon and chemist. Darnall invented a mechanical 'chlorinator' to purify drinking water using liquid chlorine. Municipal water purification world wide is now based on this technique.

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