Images Dated 11th May 2004

Lecture on Stephen Grays discoveries in electricity

A lecture at the Charterhouse, London on Stephen Gray's discoveries in electricity. In the early eighteenth century, Gray demonstrated that charges of electricity could be conducted by some materials for distances as great as 765 feet, while others did not conduct electricity at all. Eventually, he was able to send charges through 88 metres of wire suspended on silken threads to operate an electroscope - an instrument used to detect static electricity. By sending an electrical signal from one place to another, Gray established the basic principle of the electric telegraph

© Mary Evans Picture Library 2015 - https://copyrighthub.org/s0/hub1/creation/maryevans/MaryEvansPictureID/10216282

HUNGARY-Budapest: Roof of Post Office Savings Bank Building- b.1901 by Odon Lechner

HUNGARY, Budapest: Roof of Post Office Savings Bank Building, b.1901 by Odon Lechner / Major Secessionist Architect

© Walter Bibikow / DanitaDelimont.com

1901, 20th Century, Architecture, Bank, Budapest, City, Commerce, Danita Delimont, Europe, Finance, Historic, Hungary, Landmark, Odon Lechner, Ornate, Post Office, Roof, Rooftop, Savings Bank, Walter Bibikow

VEK00048

Historic stone walls with ocean in distance, near Kiama, South coast, New South Wales, Australia

© Michael Van Ewijk/AUSCAPE All rights reserved

Historic Stone Walls With Ocean In Distance Near Kiama, New South Wales, South Co, South Coast