six-stage super heterodyne receiver processed on the ECME system, 1936-1955 Radio Communication 1936-1955
Print, 'Searching Fault' scene on 'Great Eastern' during the laying of the first Atlantic cable, 1865-1867 Telecommunications 1865-1867
Print, 'Interior Tanks', a scene on 'Great Eastern' during the laying of the first Atlantic cable, 1865-1867 Telecommunications 1865-1867