Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 142,947 pages of information and 228,874 images on early companies, their products and the people who designed and built them.
1870s-1890s - 89 Bishopgate Street
1900s - 34 Chamomile St. & 89 Bishopsgate Street
1950s-1975 - 390 Sydenham Road, Croydon
1889 Exhibited scientific apparatus
1910 Exhibited at the Physical Society's Exhibition