Every such instrument, duly executed, shall be a conveyance to the grantee, his heirs, and assigns, of all right, title, and interest of the grantor in the premises described, but shall not extend to after - acquired title, unless words expressing such intention be added. Source: SL 1911, ch 257 , § 2; RC 1919, § 542; SDC 1939, § 51.1403.