PROF. E. G. COKEB, who is this year retiring from the Kennedy chair of civil and mechanical engineer ing in University College, London, was appointed to his chair not long before the outbreak of the War, which found him in Australia, where he had gone as president of Section G of the British Association. In common with a number of other scientific workers, he had some unexpectedly exciting experiences on that occasion, narrowly escaping capture by the German cruiser Emden. Prof. Coker went to Uni versity College from the City and Guilds Technical College, Finsbury, where for some years he was the colleague of Silvanus Thompson, who was associated with some of his earlier work on polarised light. Before that time he was associate professor of civil engineering in McGill University, Montreal. Prof. Coker's name is chiefly associated, in the minds of engineers, with the direct exploration of stress in machines and structures by means of polarised light, a field which he has made peculiarly his own and which has been largely built up by his own efforts.