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William Firth (1835-1892) of William Firth, iron master and iron merchant.
1835 Born son of George Firth, who started as an iron merchant in Leeds.
1881 William Firth 45, iron merchant, lived in Leeds with Selina Firth 34, William Firth Junior 11, Maud Josephina Firth 11, Fred George Firth 8, Beatrice Firth 6, Hilda M. Firth 3, Norah F. Firth 2, Gerald G. Firth 1
c1881 Birth of son Douglas Ambrose Firth
1892 Died in Woodesly and Water Lane, Leeds
1892 Obituary 
WILLIAM FIRTH was born at Leeds on 27th August 1835.
On leaving school he joined his father in his business of iron and steel merchant, which had been started about 1823 and gradually increased, chiefly in connection with local engineering firms and with collieries in various parts of England. In the latter he did much in recent years to introduce the use of rolled steel girders in the place of timber supports for the roof of mines; and also a pit prop formed from a steel girder.
He was also managing director of the Thornhill Iron and Steel Co., Dewsbury.
His death took place at Leeds on 12th November 1892, in the fifty-eighth year of his age.
He became a Member of this Institution in 1887.