Brown's Gas is a mixture of hydrogen and oxygen. The product of an Electrolyzer. Two parts hydrogen to one part oxygen plus some water moisture. Named after Prof. Yull Brown but goes by many other names: Rhode's Gas, after it earlier researcher, Dr. William A. Rhodes; also called HHO (Hydrogen-Hydrogen-Oxygen), hydroxy, oxy-hydrogen, green gas, di-hydroxy, watergas or water gas, waterfuel or water fuel, etc. In Korea they call it Brown Gas. Korea by the way has very good technology of HHO generators for industry. Brown's Gas is great not only for supplemental fuel for engines, but also good for cutting metal, soldering, brazing (joining metals at high temperatures), as well as the welding of various metals inexpensively (compared to the commonly used welding with acetylene).
Oxyhydrogen gas produced in a common-ducted electrolyzer has been referred to as Brown's gas,after Yull Brown who received a utility patent for a series cell common-ducted electrolyzer in 1977 and 1978 (the term Brown's gas is not used in his patents, but "a mixture of oxygen and hydrogen" is referenced). Brown's torches also used an electric arc to increase the temperature of the flame (called atomic welding).