Arthur David Ritchie FRSE ((1891-06-22)22 June 1891 – (1967-03-12)12 March 1967) was a British chemical physiologist and philosopher.
[1] He was born Oxford on 22 June 1891 the son of Prof David George Ritchie.
The family moved to St Andrews in 1894 when his father was given a new professorship there.
He was elected a fellow of Trinity College, Cambridge with a dissertation on scientific method, but shortly afterwards moved to the University of Manchester, where he was appointed lecturer in biological chemistry in 1922 and lecturer in physiological chemistry in 1924.
[2] From 1937 to 1945 he held the Sir Samuel Hall chair as Professor of Philosophy at Manchester University.