LLM6006346:
The 1,000,000-volt testing transformer in the research laboratory at Stourport (b/w photo), English Photographer, (20th century) / Bridgeman Images
LLM6006357:
Professor A M Low, with the audiometer which he invented to photograph noise (b/w photo), English Photographer, (20th century) / Bridgeman Images
LLM6006366:
Professor Edgeworth David photographed immediately after hoisting the Union Jack at the South Magnetic Pole (b/w photo), English Photographer, (20th century) / Bridgeman Images
LLM6006362:
The Marchese Marconi speaking from his yacht in Genoa Harbour to an audience in Sydney (b/w photo), English Photographer, (20th century) / Bridgeman Images