9-321. Public record of private writing — How proved. A public record of a private writing may be proved by the original record, or by a copy thereof, certified by the legal keeper of the record.
[(9-321) C.C.P. 1881, sec. 915; R.S., R.C., & C.L., sec. 5978; C.S., sec. 7953; I.C.A., sec. 16-314.]