Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 144,265 pages of information and 230,174 images on early companies, their products and the people who designed and built them.
also Jules Digeon et Fils aîné, of rue de Lancry 56, Paris
J. H. Digeon was responsible for the construction of models to demonstrate scientific principles and fine scale models of machinery for museums. Numerous examples are in the possession of the Musée des Arts et Métiers in Paris.