Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 133,756 pages of information and 211,899 images on early companies, their products and the people who designed and built them.
Harry Thornton Calvert M.B.E.
Chemical Inspector and Director of Water Pollution Research, Ministry of Health and Dept. of Scientific and Industrial Research respectively, Ministry of Health, Whitehall, London, S.W.1.