25. Where a book or other document is of so public a nature as to be admissible in evidence on its mere production from the proper custody, and no other Act exists that renders its contents provable by means of a copy, a copy thereof or extract therefrom is admissible in evidence in any court of justice or before a person having, by law or by consent of parties, authority to hear, receive and examine evidence, if it is proved that it is a copy or extract purporting to be certified to be true by the officer to whose custody the original has been entrusted.

R.S., c. E-10, s. 25.