Famous Like Me > Actor > J > John Joly
Profile of John Joly
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| Name: |
John Joly |
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| Date of Birth: |
2nd March 1948 |
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| Place of Birth: |
New Orleans, Louisiana, USA |
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| Profession: |
Actor |
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From Wikipedia, the free Encyclopedia
John Joly (November 1, 1857 – December 8, 1933) was an Irish scientist, possibly most famous for his development of radiotherapy in the treatment of cancer. He is also known for developing techniques to accurately estimate the age of a geological period, based on radioactive elements present in minerals.
He entered Trinity College, Dublin, to become a graduate in engineering in 1882 and later become Professor of Geology there. In his career he wrote over 270 books and scientific papers. In 1884 he patented a method of colour photography.
Joly's paper "Uranium and Geology" was given as an address to the British Association for the Advancement of Science which met in Dublin in 1908. This work described radioactive materials in rocks and their part in the generation of the Earth's internal heat.
Joly, along with Henry Dixon, put forward the cohesion-tension method. This is now thought to be the main mechanism for the upward movement of water in plants.
His younger brother Charles Jasper Joly became Astronomer Royal for Ireland in 1897. Their father was Rev. John Swilt Joly, rector of Tullamore from 1861 to 1869.
A crater on Mars was named in his honor.
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