Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 142,963 pages of information and 228,875 images on early companies, their products and the people who designed and built them.
Harold John Boyland B.Sc. (Eng.), A.M.I.E.E., M.R.S.T.
1939 Lecturer in Elect. Eng., Northampton Polytechnic Institute, London, St. John Street, Clerkenwell, London, E.C.1. Private address: 60, Sunray Avenue, London, S.E.24.