births
Alexander Mitchell, Irish engineer, invented the Screw-pile lighthouse (died 1868)
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Alexander Mitchell (engineer)
Irish inventor and engineer (1780–1868)
Alexander Mitchell was an Irish engineer who from 1802 was blind. He is known as the inventor of the screw-pile lighthouse.Source: Wikipedia (CC BY-SA)
Screw-pile lighthouse
Lighthouse design standing on piles
A screw-pile lighthouse is a lighthouse which stands on piles that are screwed into sandy or muddy sea or river bottoms. The first screw-pile lighthouse to begin construction was built by the blind Irish engineer Alexander Mitchell. Construction began in 1838 at the mouth of the…Source: Wikipedia (CC BY-SA)