Grace's Guide

British Industrial History

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,155 pages of information and 233,681 images on early companies, their products and the people who designed and built them.

Thomas McDowell

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February 1931. Duct Work.

1958 Old established ventilation engineers; acquired by Richard Crittall and Co[1]

See Also

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Sources of Information

  1. The Times, May 12, 1958