Ernest Howard Griffiths (15 June 1851 – 3 March 1932) was a British physicist born in Brecon, Wales.

He was elected a Fellow of the Royal Society in 1895[1] and won its Hughes Medal in 1907.

On his maternal side he was a descendant of the 17th-century admiral Robert Blake.

Griffiths was appointed principal of the University College of South Wales and Monmouthshire, Cardiff in 1901[2] and given a professorship in experimental philosophy.

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