Metal base or part from a Nernst Electric lamp Series of examples illustrating growth of the Nernst Electric lamp 1897-1903
Series of examples illustrating growth of the Nernst Electric lamp Series of examples illustrating growth of the Nernst Electric lamp 1897-1903
Sectioned example of Joy's Assistant Cylinder for Slide Valves, 1889 (Ex.1897-56 Pr.) ( See diagram 1927-2035) Sectioned example of Joy's Assistant Cylinder for Slide Valves 1889