§ 5. Letters patent, form and contents; to be recorded in the office of the secretary of state. All letters patent shall be in such form as the commissioner of general services directs. All letters patent granting unappropriated state lands, as defined by this chapter, shall contain an exception and reservation of all gold and silver mines. All letters patent shall be recorded in a book or books to be kept for that purpose in the office of the department of state, and the record thereof in any such book or a copy of any letters patent duly certified by the secretary of state to be a copy of such record thereof, whether heretofore or hereafter recorded, shall be received in evidence in any court in this state with the same force and effect as the original of such letters patent.