Static Gallery

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

United States Marine Corps - Douglas C-117D Skytrain 50835

United States Marine Corps - Douglas C-117D Skytrain 50835 (msn 43321, unit code WZ, call-sign 835') in 1963-65(WZ is tail-code for AIRFMFPAC - Air Fleet Marine Force, Pacific) Built for the United States Army Air Force (USAAF) as C-47B-DK 43-49737 (msn 15553 - 26998). January 1945 to United States Navy as R4D-6 50835.1950s: Modified to R4D-8 with new msn 43321 and redesignated C-117D in 1962. December 1979 : withdrawn from use at Marine Corps Air Station Iwakuni, Japan. Sep85: registered as N835TD The last C-117D to serve with USMC, it was on static display at MCAS Miramar, CA., and seen at the Marine Corps Museum, MCAS El Toro CA., on 13 March 1993. Date: circa 1964

© The Peter Butt Aviation Collection / Mary Evans

Lightning in a laboratory: million volt flash passing from a copper ball to an earth

6000077 Lightning in a laboratory: million volt flash passing from a copper ball to an earth consisting of a metal plate below (colour litho) by English School, (20th century); Private Collection; (add.info.: Lightning in a laboratory: million volt flash passing from a copper ball to an earth consisting of a metal plate below. Illustration from The Wonder Book of Science (Ward, Lock & Co, Limited, London and Melbourne, c1935).); A© Look and Learn; English, out of copyright

© © Look and Learn / Bridgeman Images