Partial Section of Typical Large American Gas Holder
A gas holder is a metallic shell which is open at the bottom (like a bell), the lower edge of which dips into a deep tank of water in order to prevent the contained gas from escaping. The framework may be either of steel or timber -- the latter being preferred for the largest holders.
This illustration shows a partial section of a typical large American gas holder. It is a 5,000,000 cubic foot holder in New York City.