Gas chamber carbon monoxide as the lethal agent. Sometimes a box filled with anesthetic gas is used to anesthetize small animals for surgery or euthanasia. Gas chamber A gas chamber is an apparatus for killing humans or other animals with gas, consisting of a sealed chamber into which a poisonous or asphyxiant gas is introduced. The most commonly used poisonous agent is hydrogen cyanide; carbon dioxide and carbon monoxide have also been used. Gas chambers were used as a method of execution for condemned prisoners in the United States beginning in the 1920s and continue to be a legal execution method in
1965 24 Hours of Le Mans the previous year’s race when Mike Rothschild had been overcome by exhaust fumes. After seeing off the Fords, the Ferraris also started having problems. First to fall was the Maranello car. An exhaust broke and Bonnier, choking from the fumes, bought the car in from third to retire as night fell. The gearbox of Parkes/Guichet got jammed in fifth gear. During the night, all of the P2s got delayed by cracks in their brake discs, which in turn gave problems in suspension, each losing 30-60 minutes or more in getting the issues fixed. The Cobras had been running very well