These two sections later became the Security Service (MI5) and the Secret Intelligence Service (MI6). Although Kell had only modest resources at his disposal-by April 1914, he only had fourteen staff-he was able to achieve considerable success against German espionage.I5 and MI6 officers and SAS troops often work together (eg MI5 surveillance officers might brief SAS troops on targets, or SAS soldiers may escort intelligence officers operating in high threat environments), and some SAS may be attached to MI5/ MI6 for particular missions.
What is GAS MANTLE? A small dome-shaped structure of knitted or woven ramie or rayon, impregnated with a solution of the nitrates of cerium and thorium, then dried, and the textile fabric burned off. Also incandescent mantle.
The Plume Model. The idea is straightforward. A mantle plume is a large column of hot rock rising through the mantle. The heat from the plume causes rocks in the lower lithosphere to melt. The largest (and most persistent) mantle plumes are presumed to form where a large volume of mantle rock is heated at the core-mantle boundary, about 1,800 miles below the surface, although smaller plumes may originate elsewhere within the mantle.