抄録
On the Irreversibility of Gas Absorption found in various kinds of Irons. Gas absorption experiment has been carried out with various kinds of iron and its alloys to investigate the effect of impurity and heat treatment. The result of experiment show that virgin iron, when it contains no other metallic element, behaves toward gas reversibly, while impure iron behaves toward gas irreversibly. That is, pure iron absorbs the same quantity of gas whether it is once heated in the gas or not while impure iron absorbs the gas in less amount when it is once heated in the gas in comparison with the virgin iron.
