Mo. Rev. Stat. § 205.640
The several county commissions shall have power, whenever they may think it expedient, to purchase or lease, or may purchase and lease, any quantity of land in their respective counties, not exceeding three hundred and twenty acres, and receive a conveyance to their county for the same.
(RSMo 1939 § 9596)
Prior revisions: 1929 § 12956; 1919 § 12205; 1909 § 1339