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Henry Horatio Dixon

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Henry Horatio Dixon

Henry Horatio Dixon
Born May 19, 1869
Died December 20, 1953
Institutions Trinity College Dublin
Known for cohesion-tension theory
Notable awards Fellow of the Royal Society[1]

Henry Horatio Dixon FRS[1] (May 19, 1869, Dublin - December 20, 1953, Dublin) was a plant biologist and professor at Trinity College Dublin. Along with John Joly, he put forward the cohesion-tension theory of water and mineral movement in plants.[1] [2]

He was born in Dublin, the youngest of the seven sons of George Dixon, a soap manufacturer and Rebecca (née Yeates) Dixon. He was educated at Rathmines School and Trinity College, Dublin.[3] After studying in Bonn, Germany he in 1894 he was appointed assistant and later full Professor of Botany at Trinity. In 1906 he became Director of the Botanic gardens and in 1910 of the Herbarium also. He had a close working relationship with physicist John Joly and together they developed the cohesion theory of the ascent of sap.

In 1907 he married Dorothea Mary, daughter of Sir John H Franks, with whom he raised three sons. He was the father of Hal Dixon and grandfather of Adrian Dixon.

In 1908 he was elected a . He delivered the society's Croonian Lecture in 1937.[4]

In 1916 he was awarded the Boyle Medal of the Royal Dublin Society [5]


  1. ^ a b c d Atkins, William Ringrose Gelston (1954). "Henry Horatio Dixon. 1869-1953".  
  2. ^ "Henry Horatio Dixon.". Plant Physiology 14 (4): i4–619. Oct 1939.  
  3. ^ "Plant Physiology". Plant Physiol. (American Society of Plant Biologists) 14 (4): i4–619. October 1939.  
  4. ^ "Library and Archive Catalogue". Royal Society. Retrieved 5 January 2011. 
  5. ^ "Henry H. Dixon". Royal Dublin Society. Retrieved 2013-02-10. 
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