The fact that argon gas was heavier than air would keep oxygen away from the plutonium.

The box was, of course, filled with argon gas.

In addition to the mercury, the tube is filled with argon gas at low pressure.

They are inside specially designed, temperature-controlled, sealed containers with argon gas.

Usually this bottle contains argon gas, because of its better insulation as compared with air.

A fluorescent bulb is a glass tube usually filled with argon gas and a little bit of mercury.

These hit the argon gas and the mercury.

The argon gas makes a plasma which lets the electrons move around better.

"The papers are delicate, so we store them in an atmosphere of argon gas," said the serling.

The radiometer contains argon gas to enable it to rotate.