30 OBITUARY YYOC. Annlyt. Div. Chem. SOC. Obituary Paul Seidelin Arup Dr. Paul Seidelin Arup, who died a t Bath on August 17th, 1975, a t the age of 91, had com- pleted 60 years of membership of the Society for Analytical Chemistry. Born in Catford, of Danish descent, he studied chemistry for an external London degree, attending some lec- tures a t the City and Guilds College, South Kensington, and Birkbeck College.Possibly because of his Danish background, he took employment in the dairy products industry, first in Britain and later in Dublin, where for 22 years lie was Head of the Butter Testing Station of the Irish Department of L4griculture. From about the beginning of IVorld War I, he published a stream of papers, mainly in The A mzlyst, on the analysis of milk, cheese, butter, margarine and packaging materials for dairy products.Several of the earlier papers are quoted in “Fifty Years of the Society of Public Analysts” by Dyer and Mitchell (Heffcr, Cambridge, 1932). In 1913, the first edition of his book “Industrial Organic Analysis for the Use of Technical and Analytical Chemists and Students” (Churchill, London) appeared. Recognition of his work on dairy chemistry came with the award of an MSc degree followed by a PhD degree from the Uni- versity of London in 1932.A notable paper published a t this time (Analyst, 1932, 57, 300) concerned the analysis of centuries-old bulk butter found in two Irish peat bogs. The practice of burying butter to preserve the valuable nutritive constituents of milk in edible form was carried out in Iceland and Finland as well as Ireland.It was on a visit there that he met his future wife. In 1921 he translated from Danish, with additions and revision, the second edition of “Dairy Bacteriology,” by S. Orla- Jensen. His interest in chemistry was not restricted to current matters. The above-mentioned paper on butter analysis reveals an appreciation of man’s use of dairy products from ancient times.He liad partially written a book on this subject but, alas, deteriorating eyesight prevented its completion. After retirement, he lived for a short time at Elsinore, but soon returned to Britain, finally settling a t Bath. He now became an abstrac- tor for Analytical Abstvacts and this work, which he enjoyed immensely, continued for about 15 years. Even in the last years of his life, his intrinsic love of chemistry did not diminish, and con- versation invariably moved to analytical methods old and new. His only son died at an early age. W. J . \qTilliams Arup maintained links with Denmark. He is survived by his wife Astrid.