Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 114,638 pages of information and 161,546 images on early companies, their products and the people who designed and built them. http://www.gracesguide.co.uk/Main_Page
Quite an informative website from the old imperial system days.....has archive of The Engineer. Used both the Imperial and Metric systems but have to say that the SI metric system is now the basis measurement system for most countries. I found it interesting to look back at some of the engineering projects that I had worked on and to refresh how they were reported technically....how technology has advanced over the years.
Tony thank you I find it fascinating ,companies long gone to those still knocking about in the 21st century