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John Henry Gill Monypenny (1885-1948) of Brown, Bayley's Steel Works
1948/49 Obituary 
JOHN HENRY GILL MONYPENNY. The death occurred at Sheffield on 2 March 1949 of Mr. J. H. G. Monypenny, who for more than forty years had been closely associated with Brown Bayley's Steel Works, Ltd.
Mr. Monypenny was born in 1885 and received the early part of his education at the Royal Grammar School, Sheffield. He then gained a technical scholarship to study metallurgy at the University College, Sheffield, and before leaving there was awarded an Associateship in Metallurgy and the Mappin Medal of the University.
In 1904, Mr. Monypenny joined the staff of Brown Bayley's Steel Works, Ltd., and for nearly twenty-five years had charge of the firm's research laboratory, for the development of which he was largely responsible. His work there was directed mainly to the investigation of stainless steels, and an account of many of the researches which he conducted is given in his book on "Stainless Iron and Steel ", the first edition of which appeared in 1926.
In 1928, Mr. Monypenny became technical representative of Brown Bayley's Steel Works, Ltd., in which position he continued until his retirement in 1946.
Throughout his career Mr. Monypenny made many valuable contributions to learned societies in this country and in America.
He was elected a member of the Institute of Metals in 1919 and was Chairman of the Sheffield Local Section from 1927 to 1929. He was, of course, a member of the Iron and Steel Institute and served on its Corrosion and Alloy Steels Research Committees. He was a Fellow of the Institute of Physics, a Fellow of the Institution of Metallurgists, a member of the American Institute of Mining and Metallurgical Engineers, and of the American Society for Metals. In addition, Mr. Monypenny served for some years on the Council of the Faraday Society, and from 1935 to 1938 was Chairman of the British Chemical Plant Manufacturers' Association.