Francis Ian Gregory Rawlins CBE FRSE FSA FIP (1895–2 March 1969) was a British physicist and crystallographer.
In 1929 he became Supervisor of Crystallography at Fitzwilliam College, Cambridge he was promoted to Director of Natural Studies.
In 1934 he became the official physicist for the National Gallery, London overseeing scientific authentication under Kenneth Clark.
His proposers were Sir Edmund Taylor Whittaker, James Pickering Kendall, Charles Barkla and John Edwin MacKenzie.
[4] In the Second World War he oversaw and advised on the relocation of the National Galleries artistic treasures to a quarry in Wales.