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.
Discovered in the late 19th century, the first clinical use of helium is indicated by a patent filed by Charles Cook in 1923 for the use of a helium and oxygen mixture (heliox) to decrease the risk of decompression sickness in divers.