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Frank Castle (1856-1928)
1928 Obituary 
FRANK CASTLE was born at Dewsbury in 1856 and after receiving his technical education at the Royal College of Science, London, served a seven years' apprenticeship with Messrs. Burman and Firth engineers and tool-makers of Dewsbury.
He spent a further two years in engineering works, during which he introduced several improvements in grinding machinery, but in 1883 returned to the Royal College of Science as an assistant and demonstrator in the mechanics and mathematics department.
He remained at the college until 1909 and afterwards became an examiner in workshop mathematics and technical drawing to the London County Council, and later examiner and science master at Eastbourne Technical Evening Schools.
He was the author of numerous books on practical mathematics and machine drawing.
He became a Member of the Institution in 1888, and his death occurred on 4th August 1928.