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4 results for: david edward hughes

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Photograph of what is thought to be the first wireless set invented by David Edward Hughes
ARP23A18_234

Photograph of what is thought to be the first wire...

Photograph of US Admirals with King George V
ARP23A17_312

Photograph of US Admirals with King George V

Carbon microphone, invented in 1878
ARP07103_460000371

Carbon microphone, invented in 1878

Carbon microphone, invented in 1878
ARP07102_390005770

Carbon microphone, invented in 1878