Gas Replaced the Noose, 1937

In 1937, following the lead set by Nevada, Arizona and Colorado in the quick and painless method of executing criminals by gas, Wyoming has installed a lethal gas chamber to replace the noose, a fast disappearing method of capital punishment.

The Wyoming death chamber, manufactured by a Denver, Colorado, firm, was claimed to be the most humane yet devised. Several other states were said to be considering the adoption of gas chambers for legal executions.

New lethal gas chamber which replaced the noose in Wyoming. The girl studying the apparatus was Helen Williams of Denver, Colo., where chamber was made for Wyoming authorities.