1. It shall also be the duty of the recorder to record all plats delivered to him for record, in a book to be called a "plat book", and, when necessary to preserve uniformity, he shall reduce the scale of the original plat, and on each copy so made he shall endorse the following certificate under his hand:
2. Copies of the record of plats from said plat book, properly certified under the hand and official seal of the recorder, shall be evidence in all courts of justice.