Specimen of steel produced by the Basic or Thomas-Gilchrist process, 1877, 1-2.25" x 0. 875" bar folded four times Specimen of steel produced by the Basic or Thomas-Gilchrist process 1877
Four specimens of wire rope illustrating John Lang's system of wire rope manufacture introduced in 1879 1879-1894
Twelve specimens of types of submarine cable composing "Mumetal" loaded cable laid from Bay Roberts to Horta
Two specimens, one telescoped and the other sectioned, of the London-Birmingham coaxial television cable laid in 1949 1949
Elementary geological collection of approximately 200 specimens contained in a mahogany cabinet fitted with five trays 1850-1899
Four specimens showing manufacture of return bends for superheater, mounted on mahogany board. Four specimens showing manufacture of return bends for superheater