Any public board in any municipality wherein there is a free public library, or any department of the government of the municipality having under its control a library or collection of books useful for such public library, may transfer the control or property of said books to the trustees of a free public library established under this article for use therein. The board or department so transferring its books or library shall be relieved from further responsibility for the care or custody of or property in said books or library, and the board of trustees of the free public library shall hold and keep said books or library as if originally purchased by it.