Wyoming Frontier Prison gas chamber

The Infamous Wyoming State Penitentiary Gas Chamber

The gas chamber in the penitentiary was installed in 1936 to replace the Julian Gallows. The execution method worked by strapping the inmate to a chair in a airtight chamber and mixing cyanide crystals into sulfuric acid to create lethal hydrogen cynaide gas. A total of five men were executed in the gas chamber in the penitentiary.