Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 143,409 pages of information and 230,040 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.