Contributions
In 1922 Jeffery published a paper describing the motion of ellipsoidal particles in a viscous fluid and setting out what are now known as Jeffery's equations. In 1923, with W. Perrett, he published what has become the definitive English translation of the seminal papers on relativity by Einstein, Lorenz, Weyl and Minkowski. In connection with this work, he corresponded with Einstein and others. In 1926, together with O. Baldwin, he published a paper presenting the gravitational plane waves, which are widely regarded as one of the most important of all exact solutions of the Einstein field equation in general relativity.
Jeffery was elected as a Fellow of the Royal Society in 1926 and served as Vice-President from 1938-1940. He was invited in October 1949 by the British Secretary of State for the Colonies to visit West Africa to study and advise on a "proposal that there should be instituted a West African School Examinations Council". He visited the Gambia, Sierra Leone, Ghana (then called The Gold Coast) and Nigeria from December 1949 to March 1950. His report (since known as the Jeffery Report), published in March 1950, strongly supported the proposal for a West African Examinations Council and made detailed recommendations on the composition and duties of the Council. The recommendations were adopted in full.
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