SSC Junior Engineer Notification. SSC Junior Engineer 2015 Notification:-. Date of Notification:- 11-07-2015. Last Date of Receiving Application:- Part-I 07-08-2015 (upto 5:00 P.M.) Part-II 10-08-2015 (upto 5:00 P.M.). SSC Junior Engineer Exam 2015 Date:- 20-12-2015.
Incandescent Gas Lantern Mantles General The thorium-containing incandescent mantle was invented in 1884 by Carl Auer von Welsbach, an Austrian chemist, and it is sometimes referred to as a Welsbach mantle or Auerlicht.This invention resulted in the first commercial use of the element thorium.he thorium-containing incandescent mantle was invented in 1884 by Carl Auer von Welsbach, an Austrian chemist, and it is sometimes referred to as a Welsbach mantle or Auerlicht. This invention resulted in the first commercial use of the element thorium.
Era of more efficient street lightning starts with William Murdock who, for the first time in 1802, lit the outside of the Soho Foundry in a public presentation with a gas light fueled with coal gas.After that, in 1807, London got its first gas lit street.Baltimore was the first city in the United States that started using gas for streetlight in 1816 while Paris started gas illumination of its streets in 1820. Gas was led through pipe installations to the gas lanterns that were placed on poles.ra of more efficient street lightning starts with William Murdock who, for the first time in 1802, lit the outside of the Soho Foundry in a public presentation with a gas light fueled with coal gas.