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Consulting Engineers, Queen Anne's Gate, London.
1882 Philip Cardew, whilst in the Royal Engineers, assisted in experiments with electric searchlights. He conceived the idea of the hot-wire galvanometer, one of the first direct reading meters, for which he was awarded a gold medal at the London Exhibition of 1885. He also came up with a method of measuring the efficiency of a dynamo.
1893 Arthur Preece started his practice as a consulting electrical engineer
1894 Philip Cardew retired from the Royal Engineers
1898 Cardew retired from the Board of Trade. He then entered into partnership with Sir William Preece and his sons, Llewellyn and Arthur, as consulting engineers. The firm was known as Preece and Cardew.
1899 Arthur was joined by his father, Sir William Preece, and the practice was merged in the firm of Preece and Cardew, the partners being Sir William Preece and his two sons, Llewellin and Arthur, together with the late Major Philip Cardew, who had retired from the post of electrical adviser to the Board of Trade.