The lighter gas came into all Wise's calculations for bolder schemes.

Methane is a lighter gas than either one of those.

Could you hold your light gas in large pottery containers?

Is there a lighter than air gas that is produced in the reaction?

A lighter than air gas should not cause an issue, but this is also an interesting question.

Under action of the heat the oil dissolved and gave way to a very light gas, having other advantageous qualities.

It was shaped like a large cigar and undoubtedly contained light gas of some kind.

A. It is the lightest gas and the simplest, most abundant element in the universe.

One pulled a cord which opened the balloon a little and let out some of the light gas.

Adding a lighter gas will only reduce the efficiency of the heavier one.