All books and other articles or money which after the passing of this Act are expressly given or bequeathed to the public or to the nation or to the Board for the purposes of the Library, or given or bequeathed by words showing an intention that the gift or bequest should enure to or for the benefit of the Library, or which are acquired by purchase or otherwise for the purposes of the Library, shall vest in the Board and be held by the Board for the purposes of the Library.