A building and loan association may set aside in its treasury, out of its earnings, a contingent fund which shall be used only for the purpose of paying losses and necessary expenses incurred in the maturing of any of its series of stock, and for the purpose of establishing and making equal, as nearly as may be, the time of maturing of all of the series. The funds so set aside may be invested as other funds of the association.

32 Del. Laws, c. 107, § ?19; 37 Del. Laws, c. 133, § ?4; Code 1935, § ?2354; 5 Del. C. 1953, § ?1914;