Period

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Listening for submarines during World War I
ARP24A00_318

Listening for submarines during World War I

A condensing air pump
ARP23A15_340

A condensing air pump

Advertisement for Ferranti
ARP17A27_047

Advertisement for Ferranti

Joseph Lushene operating long-wave radio receiver
ARP17A26_069

Joseph Lushene operating long-wave radio receiver

Advertisement for Ferranti
ARP17A27_045

Advertisement for Ferranti

Advertisement for Ferranti
ARP17A27_044

Advertisement for Ferranti

John Smeaton's
ARP07113_010426P

John Smeaton's

Athanor or 'Slow Harry'
ARP07104_460001054

Athanor or 'Slow Harry'

Laboratory for refining gold and silver
ARP07104_460001056

Laboratory for refining gold and silver

Distillation of oil of vitriol also known as sulphuric acid
ARP07104_460001202

Distillation of oil of vitriol also known as sulph...

Engraving showing a telephone apparatus available to New York subscribers
ARP07094_390000681

Engraving showing a telephone apparatus available ...

Engraving showing a telephone apparatus available to New York subscribers
ARP07094_390000682

Engraving showing a telephone apparatus available ...

New York telephone subscriber making call through operator at telephone exchange
ARP07094_390000683

New York telephone subscriber making call through ...

Edison carbon telephone: Wall-mounted model with 'pony-crown' receiver (right)
ARP07094_390000685

Edison carbon telephone: Wall-mounted model with '...