BERTHELOT, PHILIPPE , French diplomat, son of the great chemist, Marcellin Berthelot, was born on Oct. 9, 1866, at Sevres. Entering the diplomatic service in 1889, he went, in 1904, to the Foreign Office, where, in 1913, he became assistant-director in the political and commercial department. In this position he did much good work during the days preceding the outbreak of the World War in 1914. During the war he acted as liaison officer between the Allied staffs, and he was a prominent figure at the subsequent peace conferences. In 1919 he was pro moted head of the political department, and in the following year became secretary-general to the ministry of foreign affairs with the rank of an ambassador. A year later he became involved in the crisis that overwhelmed the Industrial Bank of China, and was accused in the Chamber of having used his position to assist the bank, of which his brother was a leading director. He resigned on Dec. 27, 1921. In March 1922 he was arraigned before a Conseil de Discipline, presided over by M. Poincare, and was sentenced to ten years' suspension from the service. In May 1924, when the embassy in London fell vacant, his name was among those mentioned for the post. When M. Herriot assumed office in Feb. 1925, it was decided that M. Berthelot might be permitted to take advantage of the amnesty law; and on April 28 he was reappointed to the secretary-generalship. In the fol lowing August he accompanied M. Briand to London to resume discussions on the Security Pact, and he was a co-delegate with Briand at the Locarno Conference. At the close of that year he conducted important negotiations with M. Chicherin for a resump tion of Franco-Russian relations. A month later, Jan. 1926, owing to a reorganization in the Foreign Office, the virtual control of the political directorate passed into his hands. He had been made a Grand Officer of the Legion of Honour in Dec. 1925. His policy, as he himself voiced it, has always been to be "a faithful practises of a policy of close union with England and of rap prochement with Germany." He died Nov. 22,