Fellow of Bailliol and Chairman of British European Airways.
Sir Harold Brewer Hartley 
GCVO CH FRS[2] (3 September 1878 – 9 September 1972) was a British 
physical chemist. He moved from academia to important positions in business and industry.
He was educated at 
Dulwich College,[3] and 
Balliol College, Oxford. As a tutor at Balliol, he supervised the research of 
Edmund Bowen[1] and 
Cyril Hinshelwood.
Hartley served in the 
First World War and was awarded the 
Military Cross. He was Bedford Lecturer in 
Physical Chemistry, at Balliol College, 
University of Oxford. He was knighted in 1928, made KCVO in 1944, GCVO in 1957 and 
Companion of Honour in 1967.
He was elected a 
Fellow of the Royal Society in May, 1926[2]. His candidacy citation read: "Distinguished for his investigations in physical and mineralogical chemistry, including electrical conductivity, ionisation, and electrolytic equilibria in aqueous and non-aqueous solutions. Has greatly contributed by his own work and that of his pupils to the building up of a notable school of physico-chemical research at Oxford. During the war and afterwards has done valuable work in connection with gas services. Acted as Chemical Adviser to the Third Army in France. Appointed Assistant Director of Gas Services, GHQ. Later appointed Controller of Chemical Warfare Department, with the rank of Brigadier-General".[5] He received the 
Hoover Medal in 1968.
Hartley was married in 1906 to Gertrude, eldest daughter of 
Arthur Lionel Smith, who was later 
Master of Balliol College. They had one son and one daughter.