Brown's Gas
Highly efficient form of Ætherine matter refined from the ætheric medium by 20th Century Terran researcher Yul Brown. Thought to be an elemental form preceding Veridigen. It is made by a proprietary process for dissociating Æther residuum in a hyper gravimetric chamber. Brown's gas was the first of the ætherine substances isolated. The substance is used for transmutation of phlogestonic wastes into more benign substances.