Every voluntary or involuntary transaction, which if recorded, filed or entered in any clerk’s office would affect unregistered land, shall, if duly registered in the office of the proper register as the case may be, and not otherwise, be notice to all persons from the time of such registration, and operate, in accordance with law and the provisions of this Chapter, upon any registered land in the county of such registration. (1913, c. 90, s. 18; C.S., s. 2415.)