Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,509 pages of information and 233,942 images on early companies, their products and the people who designed and built them.
Thomas Leonard Walker
1922 M.A., Ph.D., F.G.S., Prof. of Mineralogy, University of Toronto, since 1902. Address: University of Toronto, Toronto, Canada.