THE Paris Academy of Sciences has two ‘secretaires perpétuels' : Prince Louis de Broglie, and very recently, Prof. Robert Courrier, who was elected in Ma-y in succession to the late Prof. Alfred Lacroix. Prof. Courrier, who was born in 1895, began his medical studies at Nancy, but they were interrupted by the First World War. On demobilization in 1919, he went to Strasbourg to work in the laboratory of the Well-known endocrinologist, Prof. P. Bouin. He was appointed a professor in the Faculty of Medicine at Algiers in 1926, and went to Paris in 1938, where he has since held a chair in the College de France. He was elected to the Academy of Medicine in 1941, and to the Academy of Sciences in 1944.